Home / 157,389.24-217,042.85-99,928.80

Finding the Fourth Proportional to 157,389.24, 217,042.85 and 99,928.80

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Solution

The fourth proportional to 157,389.24, 217,042.85 and 99,928.80 is: 137,803.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,389.24 : 217,042.85 = 99,928.80 : x
  2. Step 2: Convert to fraction form
    157,389.24/217,042.85 = 99,928.80/x
  3. Step 3: Cross multiply
    157,389.24x = 217,042.85 × 99,928.80
  4. Step 4: Simplify right side
    157,389.24x = 21,688,831,863.35
  5. Step 5: Solve for x
    x = 21,688,831,863.35/157,389.24
  6. Step 6: Final answer
    x = 137,803.78

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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.