Home / 142,151.48-196,170.53-78,489.12

Finding the Fourth Proportional to 142,151.48, 196,170.53 and 78,489.12

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Solution

The fourth proportional to 142,151.48, 196,170.53 and 78,489.12 is: 108,315.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,151.48 : 196,170.53 = 78,489.12 : x
  2. Step 2: Convert to fraction form
    142,151.48/196,170.53 = 78,489.12/x
  3. Step 3: Cross multiply
    142,151.48x = 196,170.53 × 78,489.12
  4. Step 4: Simplify right side
    142,151.48x = 15,397,251,877.19
  5. Step 5: Solve for x
    x = 15,397,251,877.19/142,151.48
  6. Step 6: Final answer
    x = 108,315.81

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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.