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Finding the Fourth Proportional to 91,507.86, 137,207.52 and 28,309.26

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Solution

The fourth proportional to 91,507.86, 137,207.52 and 28,309.26 is: 42,447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,507.86 : 137,207.52 = 28,309.26 : x
  2. Step 2: Convert to fraction form
    91,507.86/137,207.52 = 28,309.26/x
  3. Step 3: Cross multiply
    91,507.86x = 137,207.52 × 28,309.26
  4. Step 4: Simplify right side
    91,507.86x = 3,884,243,357.64
  5. Step 5: Solve for x
    x = 3,884,243,357.64/91,507.86
  6. Step 6: Final answer
    x = 42,447.10

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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.