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Finding the Fourth Proportional to 91,323.80, 136,985.70 and 56,149.40

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Solution

The fourth proportional to 91,323.80, 136,985.70 and 56,149.40 is: 84,224.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,323.80 : 136,985.70 = 56,149.40 : x
  2. Step 2: Convert to fraction form
    91,323.80/136,985.70 = 56,149.40/x
  3. Step 3: Cross multiply
    91,323.80x = 136,985.70 × 56,149.40
  4. Step 4: Simplify right side
    91,323.80x = 7,691,664,863.58
  5. Step 5: Solve for x
    x = 7,691,664,863.58/91,323.80
  6. Step 6: Final answer
    x = 84,224.10

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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.