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Finding the Fourth Proportional to 100,826.79, 139,188.20 and 58,377.12

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Solution

The fourth proportional to 100,826.79, 139,188.20 and 58,377.12 is: 80,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,826.79 : 139,188.20 = 58,377.12 : x
  2. Step 2: Convert to fraction form
    100,826.79/139,188.20 = 58,377.12/x
  3. Step 3: Cross multiply
    100,826.79x = 139,188.20 × 58,377.12
  4. Step 4: Simplify right side
    100,826.79x = 8,125,406,253.98
  5. Step 5: Solve for x
    x = 8,125,406,253.98/100,826.79
  6. Step 6: Final answer
    x = 80,587.77

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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.