Home / 139,275.41-192,211.95-78,856.70

Finding the Fourth Proportional to 139,275.41, 192,211.95 and 78,856.70

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Solution

The fourth proportional to 139,275.41, 192,211.95 and 78,856.70 is: 108,828.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,275.41 : 192,211.95 = 78,856.70 : x
  2. Step 2: Convert to fraction form
    139,275.41/192,211.95 = 78,856.70/x
  3. Step 3: Cross multiply
    139,275.41x = 192,211.95 × 78,856.70
  4. Step 4: Simplify right side
    139,275.41x = 15,157,199,412.22
  5. Step 5: Solve for x
    x = 15,157,199,412.22/139,275.41
  6. Step 6: Final answer
    x = 108,828.97

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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.