Home / 85,947.52-128,916.08-51,108.88

Finding the Fourth Proportional to 85,947.52, 128,916.08 and 51,108.88

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Solution

The fourth proportional to 85,947.52, 128,916.08 and 51,108.88 is: 76,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.52 : 128,916.08 = 51,108.88 : x
  2. Step 2: Convert to fraction form
    85,947.52/128,916.08 = 51,108.88/x
  3. Step 3: Cross multiply
    85,947.52x = 128,916.08 × 51,108.88
  4. Step 4: Simplify right side
    85,947.52x = 6,588,756,462.79
  5. Step 5: Solve for x
    x = 6,588,756,462.79/85,947.52
  6. Step 6: Final answer
    x = 76,660.23

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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.