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Finding the Fourth Proportional to 117,955,616.80, 176,933,425.20 and 66,937,280.80

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Solution

The fourth proportional to 117,955,616.80, 176,933,425.20 and 66,937,280.80 is: 100,405,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,955,616.80 : 176,933,425.20 = 66,937,280.80 : x
  2. Step 2: Convert to fraction form
    117,955,616.80/176,933,425.20 = 66,937,280.80/x
  3. Step 3: Cross multiply
    117,955,616.80x = 176,933,425.20 × 66,937,280.80
  4. Step 4: Simplify right side
    117,955,616.80x = 11,843,442,365,518,194
  5. Step 5: Solve for x
    x = 11,843,442,365,518,194/117,955,616.80
  6. Step 6: Final answer
    x = 100,405,921.20

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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.