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Finding the Fourth Proportional to 127,889,999.60, 191,834,999.40 and 47,142,460.40

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Solution

The fourth proportional to 127,889,999.60, 191,834,999.40 and 47,142,460.40 is: 70,713,690.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,889,999.60 : 191,834,999.40 = 47,142,460.40 : x
  2. Step 2: Convert to fraction form
    127,889,999.60/191,834,999.40 = 47,142,460.40/x
  3. Step 3: Cross multiply
    127,889,999.60x = 191,834,999.40 × 47,142,460.40
  4. Step 4: Simplify right side
    127,889,999.60x = 9,043,573,862,548,524
  5. Step 5: Solve for x
    x = 9,043,573,862,548,524/127,889,999.60
  6. Step 6: Final answer
    x = 70,713,690.60

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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.