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Finding the Fourth Proportional to 78,853.64, 108,801.78 and 45,313.16

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Solution

The fourth proportional to 78,853.64, 108,801.78 and 45,313.16 is: 62,522.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,853.64 : 108,801.78 = 45,313.16 : x
  2. Step 2: Convert to fraction form
    78,853.64/108,801.78 = 45,313.16/x
  3. Step 3: Cross multiply
    78,853.64x = 108,801.78 × 45,313.16
  4. Step 4: Simplify right side
    78,853.64x = 4,930,152,465.42
  5. Step 5: Solve for x
    x = 4,930,152,465.42/78,853.64
  6. Step 6: Final answer
    x = 62,522.83

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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.