Home / 78,835.20-108,794.88-45,312

Finding the Fourth Proportional to 78,835.20, 108,794.88 and 45,312

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Solution

The fourth proportional to 78,835.20, 108,794.88 and 45,312 is: 62,531.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,835.20 : 108,794.88 = 45,312 : x
  2. Step 2: Convert to fraction form
    78,835.20/108,794.88 = 45,312/x
  3. Step 3: Cross multiply
    78,835.20x = 108,794.88 × 45,312
  4. Step 4: Simplify right side
    78,835.20x = 4,929,713,602.56
  5. Step 5: Solve for x
    x = 4,929,713,602.56/78,835.20
  6. Step 6: Final answer
    x = 62,531.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.