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Finding the Fourth Proportional to 48,634.80, 72,995.40 and 42,068.40

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Solution

The fourth proportional to 48,634.80, 72,995.40 and 42,068.40 is: 63,139.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,634.80 : 72,995.40 = 42,068.40 : x
  2. Step 2: Convert to fraction form
    48,634.80/72,995.40 = 42,068.40/x
  3. Step 3: Cross multiply
    48,634.80x = 72,995.40 × 42,068.40
  4. Step 4: Simplify right side
    48,634.80x = 3,070,799,685.36
  5. Step 5: Solve for x
    x = 3,070,799,685.36/48,634.80
  6. Step 6: Final answer
    x = 63,139.97

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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.