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Finding the Fourth Proportional to 84,312.28, 126,579.59 and 77,349.42

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Solution

The fourth proportional to 84,312.28, 126,579.59 and 77,349.42 is: 116,126.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.28 : 126,579.59 = 77,349.42 : x
  2. Step 2: Convert to fraction form
    84,312.28/126,579.59 = 77,349.42/x
  3. Step 3: Cross multiply
    84,312.28x = 126,579.59 × 77,349.42
  4. Step 4: Simplify right side
    84,312.28x = 9,790,857,870.34
  5. Step 5: Solve for x
    x = 9,790,857,870.34/84,312.28
  6. Step 6: Final answer
    x = 116,126.12

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1.5x scale

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.