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Finding the Fourth Proportional to 77,683.40, 116,612.70 and 51,439.40

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Solution

The fourth proportional to 77,683.40, 116,612.70 and 51,439.40 is: 77,217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,683.40 : 116,612.70 = 51,439.40 : x
  2. Step 2: Convert to fraction form
    77,683.40/116,612.70 = 51,439.40/x
  3. Step 3: Cross multiply
    77,683.40x = 116,612.70 × 51,439.40
  4. Step 4: Simplify right side
    77,683.40x = 5,998,487,320.38
  5. Step 5: Solve for x
    x = 5,998,487,320.38/77,683.40
  6. Step 6: Final answer
    x = 77,217.11

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1.5x scale

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.