Home / 123,301.17-170,000.70-100,617.12

Finding the Fourth Proportional to 123,301.17, 170,000.70 and 100,617.12

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Solution

The fourth proportional to 123,301.17, 170,000.70 and 100,617.12 is: 138,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,301.17 : 170,000.70 = 100,617.12 : x
  2. Step 2: Convert to fraction form
    123,301.17/170,000.70 = 100,617.12/x
  3. Step 3: Cross multiply
    123,301.17x = 170,000.70 × 100,617.12
  4. Step 4: Simplify right side
    123,301.17x = 17,104,980,831.98
  5. Step 5: Solve for x
    x = 17,104,980,831.98/123,301.17
  6. Step 6: Final answer
    x = 138,725.21

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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.