Home / 91,824.90-137,737.35-81,111.30

Finding the Fourth Proportional to 91,824.90, 137,737.35 and 81,111.30

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Solution

The fourth proportional to 91,824.90, 137,737.35 and 81,111.30 is: 121,666.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,824.90 : 137,737.35 = 81,111.30 : x
  2. Step 2: Convert to fraction form
    91,824.90/137,737.35 = 81,111.30/x
  3. Step 3: Cross multiply
    91,824.90x = 137,737.35 × 81,111.30
  4. Step 4: Simplify right side
    91,824.90x = 11,172,055,517.06
  5. Step 5: Solve for x
    x = 11,172,055,517.06/91,824.90
  6. Step 6: Final answer
    x = 121,666.95

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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.