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Finding the Fourth Proportional to 72,236.99, 99,681.63 and 40,399.74

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Solution

The fourth proportional to 72,236.99, 99,681.63 and 40,399.74 is: 55,748.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,236.99 : 99,681.63 = 40,399.74 : x
  2. Step 2: Convert to fraction form
    72,236.99/99,681.63 = 40,399.74/x
  3. Step 3: Cross multiply
    72,236.99x = 99,681.63 × 40,399.74
  4. Step 4: Simplify right side
    72,236.99x = 4,027,111,934.78
  5. Step 5: Solve for x
    x = 4,027,111,934.78/72,236.99
  6. Step 6: Final answer
    x = 55,748.62

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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.