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Finding the Fourth Proportional to 85,866.72, 128,830.74 and 52,201.23

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Solution

The fourth proportional to 85,866.72, 128,830.74 and 52,201.23 is: 78,320.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,866.72 : 128,830.74 = 52,201.23 : x
  2. Step 2: Convert to fraction form
    85,866.72/128,830.74 = 52,201.23/x
  3. Step 3: Cross multiply
    85,866.72x = 128,830.74 × 52,201.23
  4. Step 4: Simplify right side
    85,866.72x = 6,725,123,089.81
  5. Step 5: Solve for x
    x = 6,725,123,089.81/85,866.72
  6. Step 6: Final answer
    x = 78,320.48

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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.