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Finding the Fourth Proportional to 185,812.72, 256,420.08 and 100,929.72

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Solution

The fourth proportional to 185,812.72, 256,420.08 and 100,929.72 is: 139,282.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,812.72 : 256,420.08 = 100,929.72 : x
  2. Step 2: Convert to fraction form
    185,812.72/256,420.08 = 100,929.72/x
  3. Step 3: Cross multiply
    185,812.72x = 256,420.08 × 100,929.72
  4. Step 4: Simplify right side
    185,812.72x = 25,880,406,876.78
  5. Step 5: Solve for x
    x = 25,880,406,876.78/185,812.72
  6. Step 6: Final answer
    x = 139,282.21

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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.