Home / 138,647.30-191,333.27-74,985.10

Finding the Fourth Proportional to 138,647.30, 191,333.27 and 74,985.10

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Solution

The fourth proportional to 138,647.30, 191,333.27 and 74,985.10 is: 103,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,647.30 : 191,333.27 = 74,985.10 : x
  2. Step 2: Convert to fraction form
    138,647.30/191,333.27 = 74,985.10/x
  3. Step 3: Cross multiply
    138,647.30x = 191,333.27 × 74,985.10
  4. Step 4: Simplify right side
    138,647.30x = 14,347,143,427.61
  5. Step 5: Solve for x
    x = 14,347,143,427.61/138,647.30
  6. Step 6: Final answer
    x = 103,479.43

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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.