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Finding the Fourth Proportional to 172,062.85, 258,130.11 and 86,721.67

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Solution

The fourth proportional to 172,062.85, 258,130.11 and 86,721.67 is: 130,100.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,062.85 : 258,130.11 = 86,721.67 : x
  2. Step 2: Convert to fraction form
    172,062.85/258,130.11 = 86,721.67/x
  3. Step 3: Cross multiply
    172,062.85x = 258,130.11 × 86,721.67
  4. Step 4: Simplify right side
    172,062.85x = 22,385,474,216.48
  5. Step 5: Solve for x
    x = 22,385,474,216.48/172,062.85
  6. Step 6: Final answer
    x = 130,100.57

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1.5x scale

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.