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Finding the Fourth Proportional to 135,904.86, 187,542.36 and 75,479.40

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Solution

The fourth proportional to 135,904.86, 187,542.36 and 75,479.40 is: 104,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,904.86 : 187,542.36 = 75,479.40 : x
  2. Step 2: Convert to fraction form
    135,904.86/187,542.36 = 75,479.40/x
  3. Step 3: Cross multiply
    135,904.86x = 187,542.36 × 75,479.40
  4. Step 4: Simplify right side
    135,904.86x = 14,155,584,807.38
  5. Step 5: Solve for x
    x = 14,155,584,807.38/135,904.86
  6. Step 6: Final answer
    x = 104,158.05

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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.