Home / 142,140.88-196,154.29-78,479.07

Finding the Fourth Proportional to 142,140.88, 196,154.29 and 78,479.07

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Solution

The fourth proportional to 142,140.88, 196,154.29 and 78,479.07 is: 108,301.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,140.88 : 196,154.29 = 78,479.07 : x
  2. Step 2: Convert to fraction form
    142,140.88/196,154.29 = 78,479.07/x
  3. Step 3: Cross multiply
    142,140.88x = 196,154.29 × 78,479.07
  4. Step 4: Simplify right side
    142,140.88x = 15,394,006,255.71
  5. Step 5: Solve for x
    x = 15,394,006,255.71/142,140.88
  6. Step 6: Final answer
    x = 108,301.05

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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.