Home / 138,941.04-191,736.13-78,510.38

Finding the Fourth Proportional to 138,941.04, 191,736.13 and 78,510.38

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Solution

The fourth proportional to 138,941.04, 191,736.13 and 78,510.38 is: 108,342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,941.04 : 191,736.13 = 78,510.38 : x
  2. Step 2: Convert to fraction form
    138,941.04/191,736.13 = 78,510.38/x
  3. Step 3: Cross multiply
    138,941.04x = 191,736.13 × 78,510.38
  4. Step 4: Simplify right side
    138,941.04x = 15,053,275,418.28
  5. Step 5: Solve for x
    x = 15,053,275,418.28/138,941.04
  6. Step 6: Final answer
    x = 108,342.90

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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.