Home / 138,880.24-191,666.51-78,461.96

Finding the Fourth Proportional to 138,880.24, 191,666.51 and 78,461.96

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Solution

The fourth proportional to 138,880.24, 191,666.51 and 78,461.96 is: 108,284.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,880.24 : 191,666.51 = 78,461.96 : x
  2. Step 2: Convert to fraction form
    138,880.24/191,666.51 = 78,461.96/x
  3. Step 3: Cross multiply
    138,880.24x = 191,666.51 × 78,461.96
  4. Step 4: Simplify right side
    138,880.24x = 15,038,530,040.96
  5. Step 5: Solve for x
    x = 15,038,530,040.96/138,880.24
  6. Step 6: Final answer
    x = 108,284.16

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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.