Home / 87,971.29-121,501.27-57,890.90

Finding the Fourth Proportional to 87,971.29, 121,501.27 and 57,890.90

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Solution

The fourth proportional to 87,971.29, 121,501.27 and 57,890.90 is: 79,955.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,971.29 : 121,501.27 = 57,890.90 : x
  2. Step 2: Convert to fraction form
    87,971.29/121,501.27 = 57,890.90/x
  3. Step 3: Cross multiply
    87,971.29x = 121,501.27 × 57,890.90
  4. Step 4: Simplify right side
    87,971.29x = 7,033,817,422.96
  5. Step 5: Solve for x
    x = 7,033,817,422.96/87,971.29
  6. Step 6: Final answer
    x = 79,955.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.