Home / 78,982.40-118,243.20-69,766.40

Finding the Fourth Proportional to 78,982.40, 118,243.20 and 69,766.40

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Solution

The fourth proportional to 78,982.40, 118,243.20 and 69,766.40 is: 104,446.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,982.40 : 118,243.20 = 69,766.40 : x
  2. Step 2: Convert to fraction form
    78,982.40/118,243.20 = 69,766.40/x
  3. Step 3: Cross multiply
    78,982.40x = 118,243.20 × 69,766.40
  4. Step 4: Simplify right side
    78,982.40x = 8,249,402,388.48
  5. Step 5: Solve for x
    x = 8,249,402,388.48/78,982.40
  6. Step 6: Final answer
    x = 104,446.08

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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.