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Finding the Fourth Proportional to 61,154.67, 91,740.50 and 21,702.40

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Solution

The fourth proportional to 61,154.67, 91,740.50 and 21,702.40 is: 32,556.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,154.67 : 91,740.50 = 21,702.40 : x
  2. Step 2: Convert to fraction form
    61,154.67/91,740.50 = 21,702.40/x
  3. Step 3: Cross multiply
    61,154.67x = 91,740.50 × 21,702.40
  4. Step 4: Simplify right side
    61,154.67x = 1,990,989,027.20
  5. Step 5: Solve for x
    x = 1,990,989,027.20/61,154.67
  6. Step 6: Final answer
    x = 32,556.61

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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.