Home / 157,831.50-217,806.18-86,211.54

Finding the Fourth Proportional to 157,831.50, 217,806.18 and 86,211.54

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Solution

The fourth proportional to 157,831.50, 217,806.18 and 86,211.54 is: 118,971.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,831.50 : 217,806.18 = 86,211.54 : x
  2. Step 2: Convert to fraction form
    157,831.50/217,806.18 = 86,211.54/x
  3. Step 3: Cross multiply
    157,831.50x = 217,806.18 × 86,211.54
  4. Step 4: Simplify right side
    157,831.50x = 18,777,406,199.32
  5. Step 5: Solve for x
    x = 18,777,406,199.32/157,831.50
  6. Step 6: Final answer
    x = 118,971.22

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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.