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Finding the Fourth Proportional to 157,007.18, 216,671.49 and 85,388.78

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Solution

The fourth proportional to 157,007.18, 216,671.49 and 85,388.78 is: 117,837.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,007.18 : 216,671.49 = 85,388.78 : x
  2. Step 2: Convert to fraction form
    157,007.18/216,671.49 = 85,388.78/x
  3. Step 3: Cross multiply
    157,007.18x = 216,671.49 × 85,388.78
  4. Step 4: Simplify right side
    157,007.18x = 18,501,313,108.52
  5. Step 5: Solve for x
    x = 18,501,313,108.52/157,007.18
  6. Step 6: Final answer
    x = 117,837.37

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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.