Home / 87,916.89-121,325.16-47,631.68

Finding the Fourth Proportional to 87,916.89, 121,325.16 and 47,631.68

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Solution

The fourth proportional to 87,916.89, 121,325.16 and 47,631.68 is: 65,731.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,916.89 : 121,325.16 = 47,631.68 : x
  2. Step 2: Convert to fraction form
    87,916.89/121,325.16 = 47,631.68/x
  3. Step 3: Cross multiply
    87,916.89x = 121,325.16 × 47,631.68
  4. Step 4: Simplify right side
    87,916.89x = 5,778,921,197.07
  5. Step 5: Solve for x
    x = 5,778,921,197.07/87,916.89
  6. Step 6: Final answer
    x = 65,731.64

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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.