Home / 100,017.28-138,038.34-57,575.44

Finding the Fourth Proportional to 100,017.28, 138,038.34 and 57,575.44

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Solution

The fourth proportional to 100,017.28, 138,038.34 and 57,575.44 is: 79,462.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,017.28 : 138,038.34 = 57,575.44 : x
  2. Step 2: Convert to fraction form
    100,017.28/138,038.34 = 57,575.44/x
  3. Step 3: Cross multiply
    100,017.28x = 138,038.34 × 57,575.44
  4. Step 4: Simplify right side
    100,017.28x = 7,947,618,162.37
  5. Step 5: Solve for x
    x = 7,947,618,162.37/100,017.28
  6. Step 6: Final answer
    x = 79,462.45

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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.