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Finding the Fourth Proportional to 213,893,999.60, 320,840,999.40 and 99,102,743.60

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Solution

The fourth proportional to 213,893,999.60, 320,840,999.40 and 99,102,743.60 is: 148,654,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,893,999.60 : 320,840,999.40 = 99,102,743.60 : x
  2. Step 2: Convert to fraction form
    213,893,999.60/320,840,999.40 = 99,102,743.60/x
  3. Step 3: Cross multiply
    213,893,999.60x = 320,840,999.40 × 99,102,743.60
  4. Step 4: Simplify right side
    213,893,999.60x = 31,796,223,299,905,948
  5. Step 5: Solve for x
    x = 31,796,223,299,905,948/213,893,999.60
  6. Step 6: Final answer
    x = 148,654,115.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.