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Finding the Fourth Proportional to 72,147.63, 108,218.36 and 70,458.17

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Solution

The fourth proportional to 72,147.63, 108,218.36 and 70,458.17 is: 105,684.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,147.63 : 108,218.36 = 70,458.17 : x
  2. Step 2: Convert to fraction form
    72,147.63/108,218.36 = 70,458.17/x
  3. Step 3: Cross multiply
    72,147.63x = 108,218.36 × 70,458.17
  4. Step 4: Simplify right side
    72,147.63x = 7,624,867,064.91
  5. Step 5: Solve for x
    x = 7,624,867,064.91/72,147.63
  6. Step 6: Final answer
    x = 105,684.24

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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.