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Finding the Fourth Proportional to 72,293.69, 99,769.11 and 45,426.26

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Solution

The fourth proportional to 72,293.69, 99,769.11 and 45,426.26 is: 62,690.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,293.69 : 99,769.11 = 45,426.26 : x
  2. Step 2: Convert to fraction form
    72,293.69/99,769.11 = 45,426.26/x
  3. Step 3: Cross multiply
    72,293.69x = 99,769.11 × 45,426.26
  4. Step 4: Simplify right side
    72,293.69x = 4,532,137,530.83
  5. Step 5: Solve for x
    x = 4,532,137,530.83/72,293.69
  6. Step 6: Final answer
    x = 62,690.64

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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.