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Finding the Fourth Proportional to 77,883.60, 107,479.24 and 42,073.50

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Solution

The fourth proportional to 77,883.60, 107,479.24 and 42,073.50 is: 58,061.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,883.60 : 107,479.24 = 42,073.50 : x
  2. Step 2: Convert to fraction form
    77,883.60/107,479.24 = 42,073.50/x
  3. Step 3: Cross multiply
    77,883.60x = 107,479.24 × 42,073.50
  4. Step 4: Simplify right side
    77,883.60x = 4,522,028,102.00
  5. Step 5: Solve for x
    x = 4,522,028,102.00/77,883.60
  6. Step 6: Final answer
    x = 58,061.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.