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Finding the Fourth Proportional to 75,118.90, 103,664.10 and 43,287.76

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Solution

The fourth proportional to 75,118.90, 103,664.10 and 43,287.76 is: 59,737.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,118.90 : 103,664.10 = 43,287.76 : x
  2. Step 2: Convert to fraction form
    75,118.90/103,664.10 = 43,287.76/x
  3. Step 3: Cross multiply
    75,118.90x = 103,664.10 × 43,287.76
  4. Step 4: Simplify right side
    75,118.90x = 4,487,386,681.42
  5. Step 5: Solve for x
    x = 4,487,386,681.42/75,118.90
  6. Step 6: Final answer
    x = 59,737.12

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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.