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Finding the Fourth Proportional to 65,506.78, 90,403.05 and 49,563.55

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Solution

The fourth proportional to 65,506.78, 90,403.05 and 49,563.55 is: 68,400.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,506.78 : 90,403.05 = 49,563.55 : x
  2. Step 2: Convert to fraction form
    65,506.78/90,403.05 = 49,563.55/x
  3. Step 3: Cross multiply
    65,506.78x = 90,403.05 × 49,563.55
  4. Step 4: Simplify right side
    65,506.78x = 4,480,696,088.83
  5. Step 5: Solve for x
    x = 4,480,696,088.83/65,506.78
  6. Step 6: Final answer
    x = 68,400.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.