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Finding the Fourth Proportional to 72,438.40, 108,636.80 and 25,041.10

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Solution

The fourth proportional to 72,438.40, 108,636.80 and 25,041.10 is: 37,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438.40 : 108,636.80 = 25,041.10 : x
  2. Step 2: Convert to fraction form
    72,438.40/108,636.80 = 25,041.10/x
  3. Step 3: Cross multiply
    72,438.40x = 108,636.80 × 25,041.10
  4. Step 4: Simplify right side
    72,438.40x = 2,720,384,779.38
  5. Step 5: Solve for x
    x = 2,720,384,779.38/72,438.40
  6. Step 6: Final answer
    x = 37,554.46

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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.