Home / 100,017.18-138,016.47-54,685.56

Finding the Fourth Proportional to 100,017.18, 138,016.47 and 54,685.56

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Solution

The fourth proportional to 100,017.18, 138,016.47 and 54,685.56 is: 75,462.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,017.18 : 138,016.47 = 54,685.56 : x
  2. Step 2: Convert to fraction form
    100,017.18/138,016.47 = 54,685.56/x
  3. Step 3: Cross multiply
    100,017.18x = 138,016.47 × 54,685.56
  4. Step 4: Simplify right side
    100,017.18x = 7,547,508,673.81
  5. Step 5: Solve for x
    x = 7,547,508,673.81/100,017.18
  6. Step 6: Final answer
    x = 75,462.12

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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.