Home / 100,298.16-138,406.32-57,854.16

Finding the Fourth Proportional to 100,298.16, 138,406.32 and 57,854.16

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Solution

The fourth proportional to 100,298.16, 138,406.32 and 57,854.16 is: 79,835.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,298.16 : 138,406.32 = 57,854.16 : x
  2. Step 2: Convert to fraction form
    100,298.16/138,406.32 = 57,854.16/x
  3. Step 3: Cross multiply
    100,298.16x = 138,406.32 × 57,854.16
  4. Step 4: Simplify right side
    100,298.16x = 8,007,381,382.29
  5. Step 5: Solve for x
    x = 8,007,381,382.29/100,298.16
  6. Step 6: Final answer
    x = 79,835.78

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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.