Home / 157,831.10-217,812.16-86,217.80

Finding the Fourth Proportional to 157,831.10, 217,812.16 and 86,217.80

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Solution

The fourth proportional to 157,831.10, 217,812.16 and 86,217.80 is: 118,983.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,831.10 : 217,812.16 = 86,217.80 : x
  2. Step 2: Convert to fraction form
    157,831.10/217,812.16 = 86,217.80/x
  3. Step 3: Cross multiply
    157,831.10x = 217,812.16 × 86,217.80
  4. Step 4: Simplify right side
    157,831.10x = 18,779,285,248.45
  5. Step 5: Solve for x
    x = 18,779,285,248.45/157,831.10
  6. Step 6: Final answer
    x = 118,983.43

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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.