Home / 78,315.20-117,485.08-25,712.72

Finding the Fourth Proportional to 78,315.20, 117,485.08 and 25,712.72

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Solution

The fourth proportional to 78,315.20, 117,485.08 and 25,712.72 is: 38,573.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,315.20 : 117,485.08 = 25,712.72 : x
  2. Step 2: Convert to fraction form
    78,315.20/117,485.08 = 25,712.72/x
  3. Step 3: Cross multiply
    78,315.20x = 117,485.08 × 25,712.72
  4. Step 4: Simplify right side
    78,315.20x = 3,020,860,966.22
  5. Step 5: Solve for x
    x = 3,020,860,966.22/78,315.20
  6. Step 6: Final answer
    x = 38,573.11

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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.