Home / 138,905.12-191,689.10-75,242.93

Finding the Fourth Proportional to 138,905.12, 191,689.10 and 75,242.93

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Solution

The fourth proportional to 138,905.12, 191,689.10 and 75,242.93 is: 103,835.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,905.12 : 191,689.10 = 75,242.93 : x
  2. Step 2: Convert to fraction form
    138,905.12/191,689.10 = 75,242.93/x
  3. Step 3: Cross multiply
    138,905.12x = 191,689.10 × 75,242.93
  4. Step 4: Simplify right side
    138,905.12x = 14,423,248,198.40
  5. Step 5: Solve for x
    x = 14,423,248,198.40/138,905.12
  6. Step 6: Final answer
    x = 103,835.26

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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.