Home / 78,785.78-108,725.07-42,975.95

Finding the Fourth Proportional to 78,785.78, 108,725.07 and 42,975.95

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Solution

The fourth proportional to 78,785.78, 108,725.07 and 42,975.95 is: 59,307.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,785.78 : 108,725.07 = 42,975.95 : x
  2. Step 2: Convert to fraction form
    78,785.78/108,725.07 = 42,975.95/x
  3. Step 3: Cross multiply
    78,785.78x = 108,725.07 × 42,975.95
  4. Step 4: Simplify right side
    78,785.78x = 4,672,563,605.04
  5. Step 5: Solve for x
    x = 4,672,563,605.04/78,785.78
  6. Step 6: Final answer
    x = 59,307.19

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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.