Home / 91,728.80-137,593.20-82,871.45

Finding the Fourth Proportional to 91,728.80, 137,593.20 and 82,871.45

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Solution

The fourth proportional to 91,728.80, 137,593.20 and 82,871.45 is: 124,307.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,728.80 : 137,593.20 = 82,871.45 : x
  2. Step 2: Convert to fraction form
    91,728.80/137,593.20 = 82,871.45/x
  3. Step 3: Cross multiply
    91,728.80x = 137,593.20 × 82,871.45
  4. Step 4: Simplify right side
    91,728.80x = 11,402,547,994.14
  5. Step 5: Solve for x
    x = 11,402,547,994.14/91,728.80
  6. Step 6: Final answer
    x = 124,307.18

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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.