Home / 91,621.48-138,138.59-91,052.84

Finding the Fourth Proportional to 91,621.48, 138,138.59 and 91,052.84

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Solution

The fourth proportional to 91,621.48, 138,138.59 and 91,052.84 is: 137,281.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,621.48 : 138,138.59 = 91,052.84 : x
  2. Step 2: Convert to fraction form
    91,621.48/138,138.59 = 91,052.84/x
  3. Step 3: Cross multiply
    91,621.48x = 138,138.59 × 91,052.84
  4. Step 4: Simplify right side
    91,621.48x = 12,577,910,933.10
  5. Step 5: Solve for x
    x = 12,577,910,933.10/91,621.48
  6. Step 6: Final answer
    x = 137,281.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.