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Finding the Fourth Proportional to 72,030.50, 99,412.11 and 40,201.44

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Solution

The fourth proportional to 72,030.50, 99,412.11 and 40,201.44 is: 55,483.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,030.50 : 99,412.11 = 40,201.44 : x
  2. Step 2: Convert to fraction form
    72,030.50/99,412.11 = 40,201.44/x
  3. Step 3: Cross multiply
    72,030.50x = 99,412.11 × 40,201.44
  4. Step 4: Simplify right side
    72,030.50x = 3,996,509,975.44
  5. Step 5: Solve for x
    x = 3,996,509,975.44/72,030.50
  6. Step 6: Final answer
    x = 55,483.58

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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.