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Finding the Fourth Proportional to 120,579, 180,822.13 and 57,350.40

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Solution

The fourth proportional to 120,579, 180,822.13 and 57,350.40 is: 86,003.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,579 : 180,822.13 = 57,350.40 : x
  2. Step 2: Convert to fraction form
    120,579/180,822.13 = 57,350.40/x
  3. Step 3: Cross multiply
    120,579x = 180,822.13 × 57,350.40
  4. Step 4: Simplify right side
    120,579x = 10,370,221,484.35
  5. Step 5: Solve for x
    x = 10,370,221,484.35/120,579
  6. Step 6: Final answer
    x = 86,003.55

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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.