Home / 142,920.54-197,242.17-79,278.90

Finding the Fourth Proportional to 142,920.54, 197,242.17 and 79,278.90

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Solution

The fourth proportional to 142,920.54, 197,242.17 and 79,278.90 is: 109,411.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,920.54 : 197,242.17 = 79,278.90 : x
  2. Step 2: Convert to fraction form
    142,920.54/197,242.17 = 79,278.90/x
  3. Step 3: Cross multiply
    142,920.54x = 197,242.17 × 79,278.90
  4. Step 4: Simplify right side
    142,920.54x = 15,637,142,271.21
  5. Step 5: Solve for x
    x = 15,637,142,271.21/142,920.54
  6. Step 6: Final answer
    x = 109,411.44

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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.