Home / 78,985.85-118,478.76-31,622.26

Finding the Fourth Proportional to 78,985.85, 118,478.76 and 31,622.26

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Solution

The fourth proportional to 78,985.85, 118,478.76 and 31,622.26 is: 47,433.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.85 : 118,478.76 = 31,622.26 : x
  2. Step 2: Convert to fraction form
    78,985.85/118,478.76 = 31,622.26/x
  3. Step 3: Cross multiply
    78,985.85x = 118,478.76 × 31,622.26
  4. Step 4: Simplify right side
    78,985.85x = 3,746,566,153.20
  5. Step 5: Solve for x
    x = 3,746,566,153.20/78,985.85
  6. Step 6: Final answer
    x = 47,433.38

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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.