Home / 78,909.18-118,364.09-19,744.68

Finding the Fourth Proportional to 78,909.18, 118,364.09 and 19,744.68

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Solution

The fourth proportional to 78,909.18, 118,364.09 and 19,744.68 is: 29,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.18 : 118,364.09 = 19,744.68 : x
  2. Step 2: Convert to fraction form
    78,909.18/118,364.09 = 19,744.68/x
  3. Step 3: Cross multiply
    78,909.18x = 118,364.09 × 19,744.68
  4. Step 4: Simplify right side
    78,909.18x = 2,337,060,981.82
  5. Step 5: Solve for x
    x = 2,337,060,981.82/78,909.18
  6. Step 6: Final answer
    x = 29,617.10

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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.