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Finding the Fourth Proportional to 91,852.80, 137,779.20 and 80,188.80

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Solution

The fourth proportional to 91,852.80, 137,779.20 and 80,188.80 is: 120,283.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,852.80 : 137,779.20 = 80,188.80 : x
  2. Step 2: Convert to fraction form
    91,852.80/137,779.20 = 80,188.80/x
  3. Step 3: Cross multiply
    91,852.80x = 137,779.20 × 80,188.80
  4. Step 4: Simplify right side
    91,852.80x = 11,048,348,712.96
  5. Step 5: Solve for x
    x = 11,048,348,712.96/91,852.80
  6. Step 6: Final answer
    x = 120,283.20

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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.