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Finding the Fourth Proportional to 65,432.22, 90,294.19 and 39,981.19

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Solution

The fourth proportional to 65,432.22, 90,294.19 and 39,981.19 is: 55,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,432.22 : 90,294.19 = 39,981.19 : x
  2. Step 2: Convert to fraction form
    65,432.22/90,294.19 = 39,981.19/x
  3. Step 3: Cross multiply
    65,432.22x = 90,294.19 × 39,981.19
  4. Step 4: Simplify right side
    65,432.22x = 3,610,069,166.29
  5. Step 5: Solve for x
    x = 3,610,069,166.29/65,432.22
  6. Step 6: Final answer
    x = 55,172.65

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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.