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Finding the Fourth Proportional to 71,867,411.20, 107,801,116.80 and 28,715,276.80

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Solution

The fourth proportional to 71,867,411.20, 107,801,116.80 and 28,715,276.80 is: 43,072,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,867,411.20 : 107,801,116.80 = 28,715,276.80 : x
  2. Step 2: Convert to fraction form
    71,867,411.20/107,801,116.80 = 28,715,276.80/x
  3. Step 3: Cross multiply
    71,867,411.20x = 107,801,116.80 × 28,715,276.80
  4. Step 4: Simplify right side
    71,867,411.20x = 3,095,538,908,261,130
  5. Step 5: Solve for x
    x = 3,095,538,908,261,130/71,867,411.20
  6. Step 6: Final answer
    x = 43,072,915.20

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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.