Home / 139,124.76-191,974.68-77,869.32

Finding the Fourth Proportional to 139,124.76, 191,974.68 and 77,869.32

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Solution

The fourth proportional to 139,124.76, 191,974.68 and 77,869.32 is: 107,449.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,124.76 : 191,974.68 = 77,869.32 : x
  2. Step 2: Convert to fraction form
    139,124.76/191,974.68 = 77,869.32/x
  3. Step 3: Cross multiply
    139,124.76x = 191,974.68 × 77,869.32
  4. Step 4: Simplify right side
    139,124.76x = 14,948,937,788.82
  5. Step 5: Solve for x
    x = 14,948,937,788.82/139,124.76
  6. Step 6: Final answer
    x = 107,449.87

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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.