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Finding the Fourth Proportional to 186,155.48, 279,011.28 and 129,689.84

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Solution

The fourth proportional to 186,155.48, 279,011.28 and 129,689.84 is: 194,380.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,155.48 : 279,011.28 = 129,689.84 : x
  2. Step 2: Convert to fraction form
    186,155.48/279,011.28 = 129,689.84/x
  3. Step 3: Cross multiply
    186,155.48x = 279,011.28 × 129,689.84
  4. Step 4: Simplify right side
    186,155.48x = 36,184,928,261.40
  5. Step 5: Solve for x
    x = 36,184,928,261.40/186,155.48
  6. Step 6: Final answer
    x = 194,380.14

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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.