Home / 138,810.20-208,061.70-76,525.40

Finding the Fourth Proportional to 138,810.20, 208,061.70 and 76,525.40

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Solution

The fourth proportional to 138,810.20, 208,061.70 and 76,525.40 is: 114,703.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,810.20 : 208,061.70 = 76,525.40 : x
  2. Step 2: Convert to fraction form
    138,810.20/208,061.70 = 76,525.40/x
  3. Step 3: Cross multiply
    138,810.20x = 208,061.70 × 76,525.40
  4. Step 4: Simplify right side
    138,810.20x = 15,922,004,817.18
  5. Step 5: Solve for x
    x = 15,922,004,817.18/138,810.20
  6. Step 6: Final answer
    x = 114,703.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.