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Finding the Fourth Proportional to 113,362,890.80, 169,792,393.80 and 87,720,753.20

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Solution

The fourth proportional to 113,362,890.80, 169,792,393.80 and 87,720,753.20 is: 131,386,175.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,362,890.80 : 169,792,393.80 = 87,720,753.20 : x
  2. Step 2: Convert to fraction form
    113,362,890.80/169,792,393.80 = 87,720,753.20/x
  3. Step 3: Cross multiply
    113,362,890.80x = 169,792,393.80 × 87,720,753.20
  4. Step 4: Simplify right side
    113,362,890.80x = 14,894,316,671,767,012
  5. Step 5: Solve for x
    x = 14,894,316,671,767,012/113,362,890.80
  6. Step 6: Final answer
    x = 131,386,175.55

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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.