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Finding the Fourth Proportional to 85,852.80, 128,779.20 and 59,587.20

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Solution

The fourth proportional to 85,852.80, 128,779.20 and 59,587.20 is: 89,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,852.80 : 128,779.20 = 59,587.20 : x
  2. Step 2: Convert to fraction form
    85,852.80/128,779.20 = 59,587.20/x
  3. Step 3: Cross multiply
    85,852.80x = 128,779.20 × 59,587.20
  4. Step 4: Simplify right side
    85,852.80x = 7,673,591,946.24
  5. Step 5: Solve for x
    x = 7,673,591,946.24/85,852.80
  6. Step 6: Final answer
    x = 89,380.80

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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.