Home / 142,757.18-197,012.88-81,521.45

Finding the Fourth Proportional to 142,757.18, 197,012.88 and 81,521.45

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Solution

The fourth proportional to 142,757.18, 197,012.88 and 81,521.45 is: 112,504.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,757.18 : 197,012.88 = 81,521.45 : x
  2. Step 2: Convert to fraction form
    142,757.18/197,012.88 = 81,521.45/x
  3. Step 3: Cross multiply
    142,757.18x = 197,012.88 × 81,521.45
  4. Step 4: Simplify right side
    142,757.18x = 16,060,774,661.21
  5. Step 5: Solve for x
    x = 16,060,774,661.21/142,757.18
  6. Step 6: Final answer
    x = 112,504.15

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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.