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Finding the Fourth Proportional to 253,993.47, 380,751.76 and 85,395.93

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Solution

The fourth proportional to 253,993.47, 380,751.76 and 85,395.93 is: 128,013.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,993.47 : 380,751.76 = 85,395.93 : x
  2. Step 2: Convert to fraction form
    253,993.47/380,751.76 = 85,395.93/x
  3. Step 3: Cross multiply
    253,993.47x = 380,751.76 × 85,395.93
  4. Step 4: Simplify right side
    253,993.47x = 32,514,650,644.34
  5. Step 5: Solve for x
    x = 32,514,650,644.34/253,993.47
  6. Step 6: Final answer
    x = 128,013.73

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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.