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Finding the Fourth Proportional to 85,363.30, 128,117.85 and 38,051.20

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Solution

The fourth proportional to 85,363.30, 128,117.85 and 38,051.20 is: 57,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,363.30 : 128,117.85 = 38,051.20 : x
  2. Step 2: Convert to fraction form
    85,363.30/128,117.85 = 38,051.20/x
  3. Step 3: Cross multiply
    85,363.30x = 128,117.85 × 38,051.20
  4. Step 4: Simplify right side
    85,363.30x = 4,875,037,933.92
  5. Step 5: Solve for x
    x = 4,875,037,933.92/85,363.30
  6. Step 6: Final answer
    x = 57,109.30

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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.