Home / 65,854.05-90,868.81-39,999.14

Finding the Fourth Proportional to 65,854.05, 90,868.81 and 39,999.14

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Solution

The fourth proportional to 65,854.05, 90,868.81 and 39,999.14 is: 55,192.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,854.05 : 90,868.81 = 39,999.14 : x
  2. Step 2: Convert to fraction form
    65,854.05/90,868.81 = 39,999.14/x
  3. Step 3: Cross multiply
    65,854.05x = 90,868.81 × 39,999.14
  4. Step 4: Simplify right side
    65,854.05x = 3,634,674,052.83
  5. Step 5: Solve for x
    x = 3,634,674,052.83/65,854.05
  6. Step 6: Final answer
    x = 55,192.87

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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.