Home / 100,158.02-138,218.19-57,715.46

Finding the Fourth Proportional to 100,158.02, 138,218.19 and 57,715.46

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Solution

The fourth proportional to 100,158.02, 138,218.19 and 57,715.46 is: 79,647.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,158.02 : 138,218.19 = 57,715.46 : x
  2. Step 2: Convert to fraction form
    100,158.02/138,218.19 = 57,715.46/x
  3. Step 3: Cross multiply
    100,158.02x = 138,218.19 × 57,715.46
  4. Step 4: Simplify right side
    100,158.02x = 7,977,326,416.22
  5. Step 5: Solve for x
    x = 7,977,326,416.22/100,158.02
  6. Step 6: Final answer
    x = 79,647.41

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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.