Home / 100,515.92-138,719.05-66,465.23

Finding the Fourth Proportional to 100,515.92, 138,719.05 and 66,465.23

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Solution

The fourth proportional to 100,515.92, 138,719.05 and 66,465.23 is: 91,726.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,515.92 : 138,719.05 = 66,465.23 : x
  2. Step 2: Convert to fraction form
    100,515.92/138,719.05 = 66,465.23/x
  3. Step 3: Cross multiply
    100,515.92x = 138,719.05 × 66,465.23
  4. Step 4: Simplify right side
    100,515.92x = 9,219,992,703.87
  5. Step 5: Solve for x
    x = 9,219,992,703.87/100,515.92
  6. Step 6: Final answer
    x = 91,726.70

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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.