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Finding the Fourth Proportional to 91,203.84, 137,024.96 and 86,168.64

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Solution

The fourth proportional to 91,203.84, 137,024.96 and 86,168.64 is: 129,460.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,203.84 : 137,024.96 = 86,168.64 : x
  2. Step 2: Convert to fraction form
    91,203.84/137,024.96 = 86,168.64/x
  3. Step 3: Cross multiply
    91,203.84x = 137,024.96 × 86,168.64
  4. Step 4: Simplify right side
    91,203.84x = 11,807,254,449.25
  5. Step 5: Solve for x
    x = 11,807,254,449.25/91,203.84
  6. Step 6: Final answer
    x = 129,460.06

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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.