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Finding the Fourth Proportional to 135,362.52, 186,798.06 and 74,931.90

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Solution

The fourth proportional to 135,362.52, 186,798.06 and 74,931.90 is: 103,404.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,362.52 : 186,798.06 = 74,931.90 : x
  2. Step 2: Convert to fraction form
    135,362.52/186,798.06 = 74,931.90/x
  3. Step 3: Cross multiply
    135,362.52x = 186,798.06 × 74,931.90
  4. Step 4: Simplify right side
    135,362.52x = 13,997,133,552.11
  5. Step 5: Solve for x
    x = 13,997,133,552.11/135,362.52
  6. Step 6: Final answer
    x = 103,404.79

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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.