Home / 142,785.84-197,045.64-79,124.70

Finding the Fourth Proportional to 142,785.84, 197,045.64 and 79,124.70

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Solution

The fourth proportional to 142,785.84, 197,045.64 and 79,124.70 is: 109,192.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,785.84 : 197,045.64 = 79,124.70 : x
  2. Step 2: Convert to fraction form
    142,785.84/197,045.64 = 79,124.70/x
  3. Step 3: Cross multiply
    142,785.84x = 197,045.64 × 79,124.70
  4. Step 4: Simplify right side
    142,785.84x = 15,591,177,151.31
  5. Step 5: Solve for x
    x = 15,591,177,151.31/142,785.84
  6. Step 6: Final answer
    x = 109,192.74

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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.