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Finding the Fourth Proportional to 157,040.70, 216,719.73 and 85,424.55

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Solution

The fourth proportional to 157,040.70, 216,719.73 and 85,424.55 is: 117,887.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,040.70 : 216,719.73 = 85,424.55 : x
  2. Step 2: Convert to fraction form
    157,040.70/216,719.73 = 85,424.55/x
  3. Step 3: Cross multiply
    157,040.70x = 216,719.73 × 85,424.55
  4. Step 4: Simplify right side
    157,040.70x = 18,513,185,411.37
  5. Step 5: Solve for x
    x = 18,513,185,411.37/157,040.70
  6. Step 6: Final answer
    x = 117,887.82

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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.