Home / 78,814.30-118,221.45-72,363.10

Finding the Fourth Proportional to 78,814.30, 118,221.45 and 72,363.10

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Solution

The fourth proportional to 78,814.30, 118,221.45 and 72,363.10 is: 108,544.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,814.30 : 118,221.45 = 72,363.10 : x
  2. Step 2: Convert to fraction form
    78,814.30/118,221.45 = 72,363.10/x
  3. Step 3: Cross multiply
    78,814.30x = 118,221.45 × 72,363.10
  4. Step 4: Simplify right side
    78,814.30x = 8,554,870,608.50
  5. Step 5: Solve for x
    x = 8,554,870,608.50/78,814.30
  6. Step 6: Final answer
    x = 108,544.65

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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.