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Finding the Fourth Proportional to 65,792.40, 90,792.28 and 40,294.68

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Solution

The fourth proportional to 65,792.40, 90,792.28 and 40,294.68 is: 55,605.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,792.40 : 90,792.28 = 40,294.68 : x
  2. Step 2: Convert to fraction form
    65,792.40/90,792.28 = 40,294.68/x
  3. Step 3: Cross multiply
    65,792.40x = 90,792.28 × 40,294.68
  4. Step 4: Simplify right side
    65,792.40x = 3,658,445,869.07
  5. Step 5: Solve for x
    x = 3,658,445,869.07/65,792.40
  6. Step 6: Final answer
    x = 55,605.90

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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.