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Finding the Fourth Proportional to 78,909.76, 118,320.96 and 26,290.56

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Solution

The fourth proportional to 78,909.76, 118,320.96 and 26,290.56 is: 39,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.76 : 118,320.96 = 26,290.56 : x
  2. Step 2: Convert to fraction form
    78,909.76/118,320.96 = 26,290.56/x
  3. Step 3: Cross multiply
    78,909.76x = 118,320.96 × 26,290.56
  4. Step 4: Simplify right side
    78,909.76x = 3,110,724,298.14
  5. Step 5: Solve for x
    x = 3,110,724,298.14/78,909.76
  6. Step 6: Final answer
    x = 39,421.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.