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Finding the Fourth Proportional to 87,398.74, 120,545.74 and 64,738.69

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Solution

The fourth proportional to 87,398.74, 120,545.74 and 64,738.69 is: 89,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,398.74 : 120,545.74 = 64,738.69 : x
  2. Step 2: Convert to fraction form
    87,398.74/120,545.74 = 64,738.69/x
  3. Step 3: Cross multiply
    87,398.74x = 120,545.74 × 64,738.69
  4. Step 4: Simplify right side
    87,398.74x = 7,803,972,829.47
  5. Step 5: Solve for x
    x = 7,803,972,829.47/87,398.74
  6. Step 6: Final answer
    x = 89,291.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.