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Finding the Fourth Proportional to 65,657.78, 90,604.01 and 38,802.79

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Solution

The fourth proportional to 65,657.78, 90,604.01 and 38,802.79 is: 53,545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,657.78 : 90,604.01 = 38,802.79 : x
  2. Step 2: Convert to fraction form
    65,657.78/90,604.01 = 38,802.79/x
  3. Step 3: Cross multiply
    65,657.78x = 90,604.01 × 38,802.79
  4. Step 4: Simplify right side
    65,657.78x = 3,515,688,373.19
  5. Step 5: Solve for x
    x = 3,515,688,373.19/65,657.78
  6. Step 6: Final answer
    x = 53,545.65

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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.