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Finding the Fourth Proportional to 77,124.60, 115,686.90 and 24,539.40

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Solution

The fourth proportional to 77,124.60, 115,686.90 and 24,539.40 is: 36,809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,124.60 : 115,686.90 = 24,539.40 : x
  2. Step 2: Convert to fraction form
    77,124.60/115,686.90 = 24,539.40/x
  3. Step 3: Cross multiply
    77,124.60x = 115,686.90 × 24,539.40
  4. Step 4: Simplify right side
    77,124.60x = 2,838,887,113.86
  5. Step 5: Solve for x
    x = 2,838,887,113.86/77,124.60
  6. Step 6: Final answer
    x = 36,809.10

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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.