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Finding the Fourth Proportional to 72,496.60, 108,540.10 and 70,448.60

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Solution

The fourth proportional to 72,496.60, 108,540.10 and 70,448.60 is: 105,473.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,496.60 : 108,540.10 = 70,448.60 : x
  2. Step 2: Convert to fraction form
    72,496.60/108,540.10 = 70,448.60/x
  3. Step 3: Cross multiply
    72,496.60x = 108,540.10 × 70,448.60
  4. Step 4: Simplify right side
    72,496.60x = 7,646,498,088.86
  5. Step 5: Solve for x
    x = 7,646,498,088.86/72,496.60
  6. Step 6: Final answer
    x = 105,473.89

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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.