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Finding the Fourth Proportional to 78,599.01, 117,915.91 and 28,678.96

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Solution

The fourth proportional to 78,599.01, 117,915.91 and 28,678.96 is: 43,024.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,599.01 : 117,915.91 = 28,678.96 : x
  2. Step 2: Convert to fraction form
    78,599.01/117,915.91 = 28,678.96/x
  3. Step 3: Cross multiply
    78,599.01x = 117,915.91 × 28,678.96
  4. Step 4: Simplify right side
    78,599.01x = 3,381,705,666.25
  5. Step 5: Solve for x
    x = 3,381,705,666.25/78,599.01
  6. Step 6: Final answer
    x = 43,024.79

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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.