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Finding the Fourth Proportional to 77,680.40, 116,608.20 and 51,436.40

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Solution

The fourth proportional to 77,680.40, 116,608.20 and 51,436.40 is: 77,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,680.40 : 116,608.20 = 51,436.40 : x
  2. Step 2: Convert to fraction form
    77,680.40/116,608.20 = 51,436.40/x
  3. Step 3: Cross multiply
    77,680.40x = 116,608.20 × 51,436.40
  4. Step 4: Simplify right side
    77,680.40x = 5,997,906,018.48
  5. Step 5: Solve for x
    x = 5,997,906,018.48/77,680.40
  6. Step 6: Final answer
    x = 77,212.60

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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.