Home / 100,365.12-138,493.86-57,937.32

Finding the Fourth Proportional to 100,365.12, 138,493.86 and 57,937.32

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Solution

The fourth proportional to 100,365.12, 138,493.86 and 57,937.32 is: 79,947.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,365.12 : 138,493.86 = 57,937.32 : x
  2. Step 2: Convert to fraction form
    100,365.12/138,493.86 = 57,937.32/x
  3. Step 3: Cross multiply
    100,365.12x = 138,493.86 × 57,937.32
  4. Step 4: Simplify right side
    100,365.12x = 8,023,963,084.86
  5. Step 5: Solve for x
    x = 8,023,963,084.86/100,365.12
  6. Step 6: Final answer
    x = 79,947.73

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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.