Home / 78,354.02-108,125.51-42,543.21

Finding the Fourth Proportional to 78,354.02, 108,125.51 and 42,543.21

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Solution

The fourth proportional to 78,354.02, 108,125.51 and 42,543.21 is: 58,707.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,354.02 : 108,125.51 = 42,543.21 : x
  2. Step 2: Convert to fraction form
    78,354.02/108,125.51 = 42,543.21/x
  3. Step 3: Cross multiply
    78,354.02x = 108,125.51 × 42,543.21
  4. Step 4: Simplify right side
    78,354.02x = 4,600,005,819.64
  5. Step 5: Solve for x
    x = 4,600,005,819.64/78,354.02
  6. Step 6: Final answer
    x = 58,707.98

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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.