Home / 77,981.40-116,972.10-69,816.60

Finding the Fourth Proportional to 77,981.40, 116,972.10 and 69,816.60

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Solution

The fourth proportional to 77,981.40, 116,972.10 and 69,816.60 is: 104,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,981.40 : 116,972.10 = 69,816.60 : x
  2. Step 2: Convert to fraction form
    77,981.40/116,972.10 = 69,816.60/x
  3. Step 3: Cross multiply
    77,981.40x = 116,972.10 × 69,816.60
  4. Step 4: Simplify right side
    77,981.40x = 8,166,594,316.86
  5. Step 5: Solve for x
    x = 8,166,594,316.86/77,981.40
  6. Step 6: Final answer
    x = 104,724.90

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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.