Home / 142,999.91-197,336.12-78,468.95

Finding the Fourth Proportional to 142,999.91, 197,336.12 and 78,468.95

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Solution

The fourth proportional to 142,999.91, 197,336.12 and 78,468.95 is: 108,285.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,999.91 : 197,336.12 = 78,468.95 : x
  2. Step 2: Convert to fraction form
    142,999.91/197,336.12 = 78,468.95/x
  3. Step 3: Cross multiply
    142,999.91x = 197,336.12 × 78,468.95
  4. Step 4: Simplify right side
    142,999.91x = 15,484,756,754.45
  5. Step 5: Solve for x
    x = 15,484,756,754.45/142,999.91
  6. Step 6: Final answer
    x = 108,285.08

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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.