Home / 142,278.24-196,341.12-78,614.40

Finding the Fourth Proportional to 142,278.24, 196,341.12 and 78,614.40

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Solution

The fourth proportional to 142,278.24, 196,341.12 and 78,614.40 is: 108,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,278.24 : 196,341.12 = 78,614.40 : x
  2. Step 2: Convert to fraction form
    142,278.24/196,341.12 = 78,614.40/x
  3. Step 3: Cross multiply
    142,278.24x = 196,341.12 × 78,614.40
  4. Step 4: Simplify right side
    142,278.24x = 15,435,239,344.13
  5. Step 5: Solve for x
    x = 15,435,239,344.13/142,278.24
  6. Step 6: Final answer
    x = 108,486.30

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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.