Home / 85,971.16-128,897.92-43,769.58

Finding the Fourth Proportional to 85,971.16, 128,897.92 and 43,769.58

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Solution

The fourth proportional to 85,971.16, 128,897.92 and 43,769.58 is: 65,624.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,971.16 : 128,897.92 = 43,769.58 : x
  2. Step 2: Convert to fraction form
    85,971.16/128,897.92 = 43,769.58/x
  3. Step 3: Cross multiply
    85,971.16x = 128,897.92 × 43,769.58
  4. Step 4: Simplify right side
    85,971.16x = 5,641,807,821.27
  5. Step 5: Solve for x
    x = 5,641,807,821.27/85,971.16
  6. Step 6: Final answer
    x = 65,624.42

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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.