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Finding the Fourth Proportional to 135,502.81, 186,978.76 and 75,058.47

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Solution

The fourth proportional to 135,502.81, 186,978.76 and 75,058.47 is: 103,572.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,502.81 : 186,978.76 = 75,058.47 : x
  2. Step 2: Convert to fraction form
    135,502.81/186,978.76 = 75,058.47/x
  3. Step 3: Cross multiply
    135,502.81x = 186,978.76 × 75,058.47
  4. Step 4: Simplify right side
    135,502.81x = 14,034,339,460.45
  5. Step 5: Solve for x
    x = 14,034,339,460.45/135,502.81
  6. Step 6: Final answer
    x = 103,572.31

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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.