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Finding the Fourth Proportional to 81,648,002.70, 122,472,004.05 and 45,741,545.10

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Solution

The fourth proportional to 81,648,002.70, 122,472,004.05 and 45,741,545.10 is: 68,612,317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648,002.70 : 122,472,004.05 = 45,741,545.10 : x
  2. Step 2: Convert to fraction form
    81,648,002.70/122,472,004.05 = 45,741,545.10/x
  3. Step 3: Cross multiply
    81,648,002.70x = 122,472,004.05 × 45,741,545.10
  4. Step 4: Simplify right side
    81,648,002.70x = 5,602,058,696,740,458
  5. Step 5: Solve for x
    x = 5,602,058,696,740,458/81,648,002.70
  6. Step 6: Final answer
    x = 68,612,317.65

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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.