Home / 142,860.12-197,153.40-81,611.70

Finding the Fourth Proportional to 142,860.12, 197,153.40 and 81,611.70

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Solution

The fourth proportional to 142,860.12, 197,153.40 and 81,611.70 is: 112,627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,860.12 : 197,153.40 = 81,611.70 : x
  2. Step 2: Convert to fraction form
    142,860.12/197,153.40 = 81,611.70/x
  3. Step 3: Cross multiply
    142,860.12x = 197,153.40 × 81,611.70
  4. Step 4: Simplify right side
    142,860.12x = 16,090,024,134.78
  5. Step 5: Solve for x
    x = 16,090,024,134.78/142,860.12
  6. Step 6: Final answer
    x = 112,627.82

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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.