Home / 78,113.03-117,145.24-28,186.62

Finding the Fourth Proportional to 78,113.03, 117,145.24 and 28,186.62

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Solution

The fourth proportional to 78,113.03, 117,145.24 and 28,186.62 is: 42,271.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,113.03 : 117,145.24 = 28,186.62 : x
  2. Step 2: Convert to fraction form
    78,113.03/117,145.24 = 28,186.62/x
  3. Step 3: Cross multiply
    78,113.03x = 117,145.24 × 28,186.62
  4. Step 4: Simplify right side
    78,113.03x = 3,301,927,854.93
  5. Step 5: Solve for x
    x = 3,301,927,854.93/78,113.03
  6. Step 6: Final answer
    x = 42,271.16

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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.