Home / 65,421.14-90,291.11-39,942.36

Finding the Fourth Proportional to 65,421.14, 90,291.11 and 39,942.36

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Solution

The fourth proportional to 65,421.14, 90,291.11 and 39,942.36 is: 55,126.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,421.14 : 90,291.11 = 39,942.36 : x
  2. Step 2: Convert to fraction form
    65,421.14/90,291.11 = 39,942.36/x
  3. Step 3: Cross multiply
    65,421.14x = 90,291.11 × 39,942.36
  4. Step 4: Simplify right side
    65,421.14x = 3,606,439,820.71
  5. Step 5: Solve for x
    x = 3,606,439,820.71/65,421.14
  6. Step 6: Final answer
    x = 55,126.52

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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.