Home / 78,748.93-118,114.75-28,137.16

Finding the Fourth Proportional to 78,748.93, 118,114.75 and 28,137.16

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Solution

The fourth proportional to 78,748.93, 118,114.75 and 28,137.16 is: 42,202.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748.93 : 118,114.75 = 28,137.16 : x
  2. Step 2: Convert to fraction form
    78,748.93/118,114.75 = 28,137.16/x
  3. Step 3: Cross multiply
    78,748.93x = 118,114.75 × 28,137.16
  4. Step 4: Simplify right side
    78,748.93x = 3,323,413,619.11
  5. Step 5: Solve for x
    x = 3,323,413,619.11/78,748.93
  6. Step 6: Final answer
    x = 42,202.65

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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.