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Finding the Fourth Proportional to 79,312.32, 118,971.71 and 20,149.52

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Solution

The fourth proportional to 79,312.32, 118,971.71 and 20,149.52 is: 30,225.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,312.32 : 118,971.71 = 20,149.52 : x
  2. Step 2: Convert to fraction form
    79,312.32/118,971.71 = 20,149.52/x
  3. Step 3: Cross multiply
    79,312.32x = 118,971.71 × 20,149.52
  4. Step 4: Simplify right side
    79,312.32x = 2,397,222,154.47
  5. Step 5: Solve for x
    x = 2,397,222,154.47/79,312.32
  6. Step 6: Final answer
    x = 30,225.09

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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.