Home / 78,510.11-117,720.54-53,580.35

Finding the Fourth Proportional to 78,510.11, 117,720.54 and 53,580.35

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Solution

The fourth proportional to 78,510.11, 117,720.54 and 53,580.35 is: 80,340.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,510.11 : 117,720.54 = 53,580.35 : x
  2. Step 2: Convert to fraction form
    78,510.11/117,720.54 = 53,580.35/x
  3. Step 3: Cross multiply
    78,510.11x = 117,720.54 × 53,580.35
  4. Step 4: Simplify right side
    78,510.11x = 6,307,508,029.69
  5. Step 5: Solve for x
    x = 6,307,508,029.69/78,510.11
  6. Step 6: Final answer
    x = 80,340.08

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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.