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Finding the Fourth Proportional to 65,931.96, 98,915.80 and 21,552.86

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Solution

The fourth proportional to 65,931.96, 98,915.80 and 21,552.86 is: 32,335.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,931.96 : 98,915.80 = 21,552.86 : x
  2. Step 2: Convert to fraction form
    65,931.96/98,915.80 = 21,552.86/x
  3. Step 3: Cross multiply
    65,931.96x = 98,915.80 × 21,552.86
  4. Step 4: Simplify right side
    65,931.96x = 2,131,918,389.19
  5. Step 5: Solve for x
    x = 2,131,918,389.19/65,931.96
  6. Step 6: Final answer
    x = 32,335.13

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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.