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Finding the Fourth Proportional to 186,139.90, 279,209.87 and 130,089.48

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Solution

The fourth proportional to 186,139.90, 279,209.87 and 130,089.48 is: 195,134.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,139.90 : 279,209.87 = 130,089.48 : x
  2. Step 2: Convert to fraction form
    186,139.90/279,209.87 = 130,089.48/x
  3. Step 3: Cross multiply
    186,139.90x = 279,209.87 × 130,089.48
  4. Step 4: Simplify right side
    186,139.90x = 36,322,266,799.17
  5. Step 5: Solve for x
    x = 36,322,266,799.17/186,139.90
  6. Step 6: Final answer
    x = 195,134.23

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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.