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Finding the Fourth Proportional to 78,816.90, 118,334.70 and 49,292.40

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Solution

The fourth proportional to 78,816.90, 118,334.70 and 49,292.40 is: 74,006.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,816.90 : 118,334.70 = 49,292.40 : x
  2. Step 2: Convert to fraction form
    78,816.90/118,334.70 = 49,292.40/x
  3. Step 3: Cross multiply
    78,816.90x = 118,334.70 × 49,292.40
  4. Step 4: Simplify right side
    78,816.90x = 5,833,001,366.28
  5. Step 5: Solve for x
    x = 5,833,001,366.28/78,816.90
  6. Step 6: Final answer
    x = 74,006.99

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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.