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Finding the Fourth Proportional to 91,029.20, 136,543.80 and 75,477.20

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Solution

The fourth proportional to 91,029.20, 136,543.80 and 75,477.20 is: 113,215.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,029.20 : 136,543.80 = 75,477.20 : x
  2. Step 2: Convert to fraction form
    91,029.20/136,543.80 = 75,477.20/x
  3. Step 3: Cross multiply
    91,029.20x = 136,543.80 × 75,477.20
  4. Step 4: Simplify right side
    91,029.20x = 10,305,943,701.36
  5. Step 5: Solve for x
    x = 10,305,943,701.36/91,029.20
  6. Step 6: Final answer
    x = 113,215.80

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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.