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Finding the Fourth Proportional to 75,812.60, 104,619.12 and 42,278.60

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Solution

The fourth proportional to 75,812.60, 104,619.12 and 42,278.60 is: 58,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,812.60 : 104,619.12 = 42,278.60 : x
  2. Step 2: Convert to fraction form
    75,812.60/104,619.12 = 42,278.60/x
  3. Step 3: Cross multiply
    75,812.60x = 104,619.12 × 42,278.60
  4. Step 4: Simplify right side
    75,812.60x = 4,423,149,926.83
  5. Step 5: Solve for x
    x = 4,423,149,926.83/75,812.60
  6. Step 6: Final answer
    x = 58,343.20

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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.