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Finding the Fourth Proportional to 85,714.80, 128,572.20 and 73,030.20

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Solution

The fourth proportional to 85,714.80, 128,572.20 and 73,030.20 is: 109,545.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,714.80 : 128,572.20 = 73,030.20 : x
  2. Step 2: Convert to fraction form
    85,714.80/128,572.20 = 73,030.20/x
  3. Step 3: Cross multiply
    85,714.80x = 128,572.20 × 73,030.20
  4. Step 4: Simplify right side
    85,714.80x = 9,389,653,480.44
  5. Step 5: Solve for x
    x = 9,389,653,480.44/85,714.80
  6. Step 6: Final answer
    x = 109,545.30

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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.