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Finding the Fourth Proportional to 153,678.50, 212,077.98 and 86,610.50

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Solution

The fourth proportional to 153,678.50, 212,077.98 and 86,610.50 is: 119,523.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,678.50 : 212,077.98 = 86,610.50 : x
  2. Step 2: Convert to fraction form
    153,678.50/212,077.98 = 86,610.50/x
  3. Step 3: Cross multiply
    153,678.50x = 212,077.98 × 86,610.50
  4. Step 4: Simplify right side
    153,678.50x = 18,368,179,886.79
  5. Step 5: Solve for x
    x = 18,368,179,886.79/153,678.50
  6. Step 6: Final answer
    x = 119,523.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.