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Finding the Fourth Proportional to 78,597.35, 117,824.90 and 28,665.74

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Solution

The fourth proportional to 78,597.35, 117,824.90 and 28,665.74 is: 42,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,597.35 : 117,824.90 = 28,665.74 : x
  2. Step 2: Convert to fraction form
    78,597.35/117,824.90 = 28,665.74/x
  3. Step 3: Cross multiply
    78,597.35x = 117,824.90 × 28,665.74
  4. Step 4: Simplify right side
    78,597.35x = 3,377,537,216.47
  5. Step 5: Solve for x
    x = 3,377,537,216.47/78,597.35
  6. Step 6: Final answer
    x = 42,972.66

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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.