Home / 85,527.60-128,291.40-76,342.20

Finding the Fourth Proportional to 85,527.60, 128,291.40 and 76,342.20

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Solution

The fourth proportional to 85,527.60, 128,291.40 and 76,342.20 is: 114,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,527.60 : 128,291.40 = 76,342.20 : x
  2. Step 2: Convert to fraction form
    85,527.60/128,291.40 = 76,342.20/x
  3. Step 3: Cross multiply
    85,527.60x = 128,291.40 × 76,342.20
  4. Step 4: Simplify right side
    85,527.60x = 9,794,047,717.08
  5. Step 5: Solve for x
    x = 9,794,047,717.08/85,527.60
  6. Step 6: Final answer
    x = 114,513.30

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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.