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Finding the Fourth Proportional to 61,235.68, 91,862.16 and 21,781.12

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Solution

The fourth proportional to 61,235.68, 91,862.16 and 21,781.12 is: 32,674.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,235.68 : 91,862.16 = 21,781.12 : x
  2. Step 2: Convert to fraction form
    61,235.68/91,862.16 = 21,781.12/x
  3. Step 3: Cross multiply
    61,235.68x = 91,862.16 × 21,781.12
  4. Step 4: Simplify right side
    61,235.68x = 2,000,860,730.42
  5. Step 5: Solve for x
    x = 2,000,860,730.42/61,235.68
  6. Step 6: Final answer
    x = 32,674.75

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1.5x scale

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.