Home / 78,487.17-117,730.60-64,579.92

Finding the Fourth Proportional to 78,487.17, 117,730.60 and 64,579.92

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Solution

The fourth proportional to 78,487.17, 117,730.60 and 64,579.92 is: 96,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,487.17 : 117,730.60 = 64,579.92 : x
  2. Step 2: Convert to fraction form
    78,487.17/117,730.60 = 64,579.92/x
  3. Step 3: Cross multiply
    78,487.17x = 117,730.60 × 64,579.92
  4. Step 4: Simplify right side
    78,487.17x = 7,603,032,729.55
  5. Step 5: Solve for x
    x = 7,603,032,729.55/78,487.17
  6. Step 6: Final answer
    x = 96,869.75

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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.