Home / 100,017.15-138,023.65-54,695.16

Finding the Fourth Proportional to 100,017.15, 138,023.65 and 54,695.16

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Solution

The fourth proportional to 100,017.15, 138,023.65 and 54,695.16 is: 75,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,017.15 : 138,023.65 = 54,695.16 : x
  2. Step 2: Convert to fraction form
    100,017.15/138,023.65 = 54,695.16/x
  3. Step 3: Cross multiply
    100,017.15x = 138,023.65 × 54,695.16
  4. Step 4: Simplify right side
    100,017.15x = 7,549,225,620.53
  5. Step 5: Solve for x
    x = 7,549,225,620.53/100,017.15
  6. Step 6: Final answer
    x = 75,479.31

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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.