Home / 78,167.16-117,256.14-31,420.02

Finding the Fourth Proportional to 78,167.16, 117,256.14 and 31,420.02

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Solution

The fourth proportional to 78,167.16, 117,256.14 and 31,420.02 is: 47,132.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,167.16 : 117,256.14 = 31,420.02 : x
  2. Step 2: Convert to fraction form
    78,167.16/117,256.14 = 31,420.02/x
  3. Step 3: Cross multiply
    78,167.16x = 117,256.14 × 31,420.02
  4. Step 4: Simplify right side
    78,167.16x = 3,684,190,263.92
  5. Step 5: Solve for x
    x = 3,684,190,263.92/78,167.16
  6. Step 6: Final answer
    x = 47,132.20

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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.