Home / 85,340.79-128,011.05-35,387.55

Finding the Fourth Proportional to 85,340.79, 128,011.05 and 35,387.55

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Solution

The fourth proportional to 85,340.79, 128,011.05 and 35,387.55 is: 53,081.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,340.79 : 128,011.05 = 35,387.55 : x
  2. Step 2: Convert to fraction form
    85,340.79/128,011.05 = 35,387.55/x
  3. Step 3: Cross multiply
    85,340.79x = 128,011.05 × 35,387.55
  4. Step 4: Simplify right side
    85,340.79x = 4,529,997,432.43
  5. Step 5: Solve for x
    x = 4,529,997,432.43/85,340.79
  6. Step 6: Final answer
    x = 53,081.27

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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.