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Finding the Fourth Proportional to 91,197.10, 125,848.72 and 57,223.88

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Solution

The fourth proportional to 91,197.10, 125,848.72 and 57,223.88 is: 78,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,197.10 : 125,848.72 = 57,223.88 : x
  2. Step 2: Convert to fraction form
    91,197.10/125,848.72 = 57,223.88/x
  3. Step 3: Cross multiply
    91,197.10x = 125,848.72 × 57,223.88
  4. Step 4: Simplify right side
    91,197.10x = 7,201,552,051.43
  5. Step 5: Solve for x
    x = 7,201,552,051.43/91,197.10
  6. Step 6: Final answer
    x = 78,966.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.