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Finding the Fourth Proportional to 78,879.96, 108,855.18 and 43,070.76

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Solution

The fourth proportional to 78,879.96, 108,855.18 and 43,070.76 is: 59,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,879.96 : 108,855.18 = 43,070.76 : x
  2. Step 2: Convert to fraction form
    78,879.96/108,855.18 = 43,070.76/x
  3. Step 3: Cross multiply
    78,879.96x = 108,855.18 × 43,070.76
  4. Step 4: Simplify right side
    78,879.96x = 4,688,475,332.54
  5. Step 5: Solve for x
    x = 4,688,475,332.54/78,879.96
  6. Step 6: Final answer
    x = 59,438.10

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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.