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Finding the Fourth Proportional to 72,041.19, 99,412.80 and 40,212.14

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Solution

The fourth proportional to 72,041.19, 99,412.80 and 40,212.14 is: 55,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,041.19 : 99,412.80 = 40,212.14 : x
  2. Step 2: Convert to fraction form
    72,041.19/99,412.80 = 40,212.14/x
  3. Step 3: Cross multiply
    72,041.19x = 99,412.80 × 40,212.14
  4. Step 4: Simplify right side
    72,041.19x = 3,997,601,431.39
  5. Step 5: Solve for x
    x = 3,997,601,431.39/72,041.19
  6. Step 6: Final answer
    x = 55,490.50

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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.