Home / 288,555.47-432,854.96-86,135.59

Finding the Fourth Proportional to 288,555.47, 432,854.96 and 86,135.59

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Solution

The fourth proportional to 288,555.47, 432,854.96 and 86,135.59 is: 129,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,555.47 : 432,854.96 = 86,135.59 : x
  2. Step 2: Convert to fraction form
    288,555.47/432,854.96 = 86,135.59/x
  3. Step 3: Cross multiply
    288,555.47x = 432,854.96 × 86,135.59
  4. Step 4: Simplify right side
    288,555.47x = 37,284,215,199.75
  5. Step 5: Solve for x
    x = 37,284,215,199.75/288,555.47
  6. Step 6: Final answer
    x = 129,209.87

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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.