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Finding the Fourth Proportional to 91,070.60, 136,523.21 and 31,873.98

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Solution

The fourth proportional to 91,070.60, 136,523.21 and 31,873.98 is: 47,782.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,070.60 : 136,523.21 = 31,873.98 : x
  2. Step 2: Convert to fraction form
    91,070.60/136,523.21 = 31,873.98/x
  3. Step 3: Cross multiply
    91,070.60x = 136,523.21 × 31,873.98
  4. Step 4: Simplify right side
    91,070.60x = 4,351,538,144.76
  5. Step 5: Solve for x
    x = 4,351,538,144.76/91,070.60
  6. Step 6: Final answer
    x = 47,782.03

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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.