Home / 130,121.47-179,557.79-79,127.12

Finding the Fourth Proportional to 130,121.47, 179,557.79 and 79,127.12

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Solution

The fourth proportional to 130,121.47, 179,557.79 and 79,127.12 is: 109,189.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,121.47 : 179,557.79 = 79,127.12 : x
  2. Step 2: Convert to fraction form
    130,121.47/179,557.79 = 79,127.12/x
  3. Step 3: Cross multiply
    130,121.47x = 179,557.79 × 79,127.12
  4. Step 4: Simplify right side
    130,121.47x = 14,207,890,849.52
  5. Step 5: Solve for x
    x = 14,207,890,849.52/130,121.47
  6. Step 6: Final answer
    x = 109,189.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.