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Finding the Fourth Proportional to 87,866.98, 121,256.20 and 47,580.74

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Solution

The fourth proportional to 87,866.98, 121,256.20 and 47,580.74 is: 65,661.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,866.98 : 121,256.20 = 47,580.74 : x
  2. Step 2: Convert to fraction form
    87,866.98/121,256.20 = 47,580.74/x
  3. Step 3: Cross multiply
    87,866.98x = 121,256.20 × 47,580.74
  4. Step 4: Simplify right side
    87,866.98x = 5,769,459,119.31
  5. Step 5: Solve for x
    x = 5,769,459,119.31/87,866.98
  6. Step 6: Final answer
    x = 65,661.29

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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.