Home / 78,557.12-108,407.05-42,747.22

Finding the Fourth Proportional to 78,557.12, 108,407.05 and 42,747.22

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Solution

The fourth proportional to 78,557.12, 108,407.05 and 42,747.22 is: 58,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,557.12 : 108,407.05 = 42,747.22 : x
  2. Step 2: Convert to fraction form
    78,557.12/108,407.05 = 42,747.22/x
  3. Step 3: Cross multiply
    78,557.12x = 108,407.05 × 42,747.22
  4. Step 4: Simplify right side
    78,557.12x = 4,634,100,015.90
  5. Step 5: Solve for x
    x = 4,634,100,015.90/78,557.12
  6. Step 6: Final answer
    x = 58,990.20

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1.5x scale

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.