Home / 142,108.29-196,109.70-78,446.13

Finding the Fourth Proportional to 142,108.29, 196,109.70 and 78,446.13

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Solution

The fourth proportional to 142,108.29, 196,109.70 and 78,446.13 is: 108,255.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,108.29 : 196,109.70 = 78,446.13 : x
  2. Step 2: Convert to fraction form
    142,108.29/196,109.70 = 78,446.13/x
  3. Step 3: Cross multiply
    142,108.29x = 196,109.70 × 78,446.13
  4. Step 4: Simplify right side
    142,108.29x = 15,384,047,020.46
  5. Step 5: Solve for x
    x = 15,384,047,020.46/142,108.29
  6. Step 6: Final answer
    x = 108,255.80

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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.