Home / 142,154.13-196,170.33-78,490.29

Finding the Fourth Proportional to 142,154.13, 196,170.33 and 78,490.29

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Solution

The fourth proportional to 142,154.13, 196,170.33 and 78,490.29 is: 108,315.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,154.13 : 196,170.33 = 78,490.29 : x
  2. Step 2: Convert to fraction form
    142,154.13/196,170.33 = 78,490.29/x
  3. Step 3: Cross multiply
    142,154.13x = 196,170.33 × 78,490.29
  4. Step 4: Simplify right side
    142,154.13x = 15,397,466,091.10
  5. Step 5: Solve for x
    x = 15,397,466,091.10/142,154.13
  6. Step 6: Final answer
    x = 108,315.29

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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.