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Finding the Fourth Proportional to 157,040.46, 216,713.61 and 85,420.98

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Solution

The fourth proportional to 157,040.46, 216,713.61 and 85,420.98 is: 117,879.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,040.46 : 216,713.61 = 85,420.98 : x
  2. Step 2: Convert to fraction form
    157,040.46/216,713.61 = 85,420.98/x
  3. Step 3: Cross multiply
    157,040.46x = 216,713.61 × 85,420.98
  4. Step 4: Simplify right side
    157,040.46x = 18,511,888,945.54
  5. Step 5: Solve for x
    x = 18,511,888,945.54/157,040.46
  6. Step 6: Final answer
    x = 117,879.74

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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.