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Finding the Fourth Proportional to 91,261.69, 136,892.53 and 28,932.19

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Solution

The fourth proportional to 91,261.69, 136,892.53 and 28,932.19 is: 43,398.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,261.69 : 136,892.53 = 28,932.19 : x
  2. Step 2: Convert to fraction form
    91,261.69/136,892.53 = 28,932.19/x
  3. Step 3: Cross multiply
    91,261.69x = 136,892.53 × 28,932.19
  4. Step 4: Simplify right side
    91,261.69x = 3,960,600,381.47
  5. Step 5: Solve for x
    x = 3,960,600,381.47/91,261.69
  6. Step 6: Final answer
    x = 43,398.28

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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.