Home / 142,046.89-196,018.05-81,574.90

Finding the Fourth Proportional to 142,046.89, 196,018.05 and 81,574.90

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Solution

The fourth proportional to 142,046.89, 196,018.05 and 81,574.90 is: 112,569.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,046.89 : 196,018.05 = 81,574.90 : x
  2. Step 2: Convert to fraction form
    142,046.89/196,018.05 = 81,574.90/x
  3. Step 3: Cross multiply
    142,046.89x = 196,018.05 × 81,574.90
  4. Step 4: Simplify right side
    142,046.89x = 15,990,152,826.95
  5. Step 5: Solve for x
    x = 15,990,152,826.95/142,046.89
  6. Step 6: Final answer
    x = 112,569.54

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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.