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Finding the Fourth Proportional to 71,288.60, 98,410.02 and 42,618.20

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Solution

The fourth proportional to 71,288.60, 98,410.02 and 42,618.20 is: 58,832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,288.60 : 98,410.02 = 42,618.20 : x
  2. Step 2: Convert to fraction form
    71,288.60/98,410.02 = 42,618.20/x
  3. Step 3: Cross multiply
    71,288.60x = 98,410.02 × 42,618.20
  4. Step 4: Simplify right side
    71,288.60x = 4,194,057,914.36
  5. Step 5: Solve for x
    x = 4,194,057,914.36/71,288.60
  6. Step 6: Final answer
    x = 58,832.10

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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.