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Finding the Fourth Proportional to 104,813.80, 157,047.90 and 87,188.20

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Solution

The fourth proportional to 104,813.80, 157,047.90 and 87,188.20 is: 130,638.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,813.80 : 157,047.90 = 87,188.20 : x
  2. Step 2: Convert to fraction form
    104,813.80/157,047.90 = 87,188.20/x
  3. Step 3: Cross multiply
    104,813.80x = 157,047.90 × 87,188.20
  4. Step 4: Simplify right side
    104,813.80x = 13,692,723,714.78
  5. Step 5: Solve for x
    x = 13,692,723,714.78/104,813.80
  6. Step 6: Final answer
    x = 130,638.56

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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.