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Finding the Fourth Proportional to 106,831.32, 147,445.71 and 64,389.90

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Solution

The fourth proportional to 106,831.32, 147,445.71 and 64,389.90 is: 88,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,831.32 : 147,445.71 = 64,389.90 : x
  2. Step 2: Convert to fraction form
    106,831.32/147,445.71 = 64,389.90/x
  3. Step 3: Cross multiply
    106,831.32x = 147,445.71 × 64,389.90
  4. Step 4: Simplify right side
    106,831.32x = 9,494,014,522.33
  5. Step 5: Solve for x
    x = 9,494,014,522.33/106,831.32
  6. Step 6: Final answer
    x = 88,869.21

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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.