Home / 78,814.20-118,221.30-77,518.20

Finding the Fourth Proportional to 78,814.20, 118,221.30 and 77,518.20

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Solution

The fourth proportional to 78,814.20, 118,221.30 and 77,518.20 is: 116,277.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,814.20 : 118,221.30 = 77,518.20 : x
  2. Step 2: Convert to fraction form
    78,814.20/118,221.30 = 77,518.20/x
  3. Step 3: Cross multiply
    78,814.20x = 118,221.30 × 77,518.20
  4. Step 4: Simplify right side
    78,814.20x = 9,164,302,377.66
  5. Step 5: Solve for x
    x = 9,164,302,377.66/78,814.20
  6. Step 6: Final answer
    x = 116,277.30

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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.