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Finding the Fourth Proportional to 90,760.84, 136,123.31 and 86,260.07

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Solution

The fourth proportional to 90,760.84, 136,123.31 and 86,260.07 is: 129,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,760.84 : 136,123.31 = 86,260.07 : x
  2. Step 2: Convert to fraction form
    90,760.84/136,123.31 = 86,260.07/x
  3. Step 3: Cross multiply
    90,760.84x = 136,123.31 × 86,260.07
  4. Step 4: Simplify right side
    90,760.84x = 11,742,006,805.19
  5. Step 5: Solve for x
    x = 11,742,006,805.19/90,760.84
  6. Step 6: Final answer
    x = 129,373.05

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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.