Home / 100,056.15-138,080.77-57,034.87

Finding the Fourth Proportional to 100,056.15, 138,080.77 and 57,034.87

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Solution

The fourth proportional to 100,056.15, 138,080.77 and 57,034.87 is: 78,709.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,056.15 : 138,080.77 = 57,034.87 : x
  2. Step 2: Convert to fraction form
    100,056.15/138,080.77 = 57,034.87/x
  3. Step 3: Cross multiply
    100,056.15x = 138,080.77 × 57,034.87
  4. Step 4: Simplify right side
    100,056.15x = 7,875,418,278.66
  5. Step 5: Solve for x
    x = 7,875,418,278.66/100,056.15
  6. Step 6: Final answer
    x = 78,709.98

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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.