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Finding the Fourth Proportional to 90,672.55, 135,981.47 and 38,070.34

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Solution

The fourth proportional to 90,672.55, 135,981.47 and 38,070.34 is: 57,094.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,672.55 : 135,981.47 = 38,070.34 : x
  2. Step 2: Convert to fraction form
    90,672.55/135,981.47 = 38,070.34/x
  3. Step 3: Cross multiply
    90,672.55x = 135,981.47 × 38,070.34
  4. Step 4: Simplify right side
    90,672.55x = 5,176,860,551.82
  5. Step 5: Solve for x
    x = 5,176,860,551.82/90,672.55
  6. Step 6: Final answer
    x = 57,094.02

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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.