Home / 142,000.20-195,969.78-81,590.40

Finding the Fourth Proportional to 142,000.20, 195,969.78 and 81,590.40

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Solution

The fourth proportional to 142,000.20, 195,969.78 and 81,590.40 is: 112,600.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,000.20 : 195,969.78 = 81,590.40 : x
  2. Step 2: Convert to fraction form
    142,000.20/195,969.78 = 81,590.40/x
  3. Step 3: Cross multiply
    142,000.20x = 195,969.78 × 81,590.40
  4. Step 4: Simplify right side
    142,000.20x = 15,989,252,738.11
  5. Step 5: Solve for x
    x = 15,989,252,738.11/142,000.20
  6. Step 6: Final answer
    x = 112,600.21

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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.