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Finding the Fourth Proportional to 77,291.60, 115,764.60 and 59,704.40

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Solution

The fourth proportional to 77,291.60, 115,764.60 and 59,704.40 is: 89,423.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,291.60 : 115,764.60 = 59,704.40 : x
  2. Step 2: Convert to fraction form
    77,291.60/115,764.60 = 59,704.40/x
  3. Step 3: Cross multiply
    77,291.60x = 115,764.60 × 59,704.40
  4. Step 4: Simplify right side
    77,291.60x = 6,911,655,984.24
  5. Step 5: Solve for x
    x = 6,911,655,984.24/77,291.60
  6. Step 6: Final answer
    x = 89,423.12

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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.