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Finding the Fourth Proportional to 124,130.32, 186,047.52 and 86,486.56

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Solution

The fourth proportional to 124,130.32, 186,047.52 and 86,486.56 is: 129,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,130.32 : 186,047.52 = 86,486.56 : x
  2. Step 2: Convert to fraction form
    124,130.32/186,047.52 = 86,486.56/x
  3. Step 3: Cross multiply
    124,130.32x = 186,047.52 × 86,486.56
  4. Step 4: Simplify right side
    124,130.32x = 16,090,610,001.33
  5. Step 5: Solve for x
    x = 16,090,610,001.33/124,130.32
  6. Step 6: Final answer
    x = 129,626.75

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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.