Home / 100,819.51-139,123.77-59,981.38

Finding the Fourth Proportional to 100,819.51, 139,123.77 and 59,981.38

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Solution

The fourth proportional to 100,819.51, 139,123.77 and 59,981.38 is: 82,770.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,819.51 : 139,123.77 = 59,981.38 : x
  2. Step 2: Convert to fraction form
    100,819.51/139,123.77 = 59,981.38/x
  3. Step 3: Cross multiply
    100,819.51x = 139,123.77 × 59,981.38
  4. Step 4: Simplify right side
    100,819.51x = 8,344,835,715.40
  5. Step 5: Solve for x
    x = 8,344,835,715.40/100,819.51
  6. Step 6: Final answer
    x = 82,770.05

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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.