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Finding the Fourth Proportional to 268,140.30, 402,264.45 and 78,600.30

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Solution

The fourth proportional to 268,140.30, 402,264.45 and 78,600.30 is: 117,916.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,140.30 : 402,264.45 = 78,600.30 : x
  2. Step 2: Convert to fraction form
    268,140.30/402,264.45 = 78,600.30/x
  3. Step 3: Cross multiply
    268,140.30x = 402,264.45 × 78,600.30
  4. Step 4: Simplify right side
    268,140.30x = 31,618,106,449.34
  5. Step 5: Solve for x
    x = 31,618,106,449.34/268,140.30
  6. Step 6: Final answer
    x = 117,916.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.