Home / 65,855.05-90,870.18-40,000.14

Finding the Fourth Proportional to 65,855.05, 90,870.18 and 40,000.14

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Solution

The fourth proportional to 65,855.05, 90,870.18 and 40,000.14 is: 55,194.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,855.05 : 90,870.18 = 40,000.14 : x
  2. Step 2: Convert to fraction form
    65,855.05/90,870.18 = 40,000.14/x
  3. Step 3: Cross multiply
    65,855.05x = 90,870.18 × 40,000.14
  4. Step 4: Simplify right side
    65,855.05x = 3,634,819,921.83
  5. Step 5: Solve for x
    x = 3,634,819,921.83/65,855.05
  6. Step 6: Final answer
    x = 55,194.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.