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Finding the Fourth Proportional to 268,249.49, 402,436.52 and 78,702.20

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Solution

The fourth proportional to 268,249.49, 402,436.52 and 78,702.20 is: 118,071.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,249.49 : 402,436.52 = 78,702.20 : x
  2. Step 2: Convert to fraction form
    268,249.49/402,436.52 = 78,702.20/x
  3. Step 3: Cross multiply
    268,249.49x = 402,436.52 × 78,702.20
  4. Step 4: Simplify right side
    268,249.49x = 31,672,639,484.34
  5. Step 5: Solve for x
    x = 31,672,639,484.34/268,249.49
  6. Step 6: Final answer
    x = 118,071.57

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1.5x scale

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.