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Finding the Fourth Proportional to 72,029.04, 108,030.60 and 42,412.20

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Solution

The fourth proportional to 72,029.04, 108,030.60 and 42,412.20 is: 63,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.04 : 108,030.60 = 42,412.20 : x
  2. Step 2: Convert to fraction form
    72,029.04/108,030.60 = 42,412.20/x
  3. Step 3: Cross multiply
    72,029.04x = 108,030.60 × 42,412.20
  4. Step 4: Simplify right side
    72,029.04x = 4,581,815,413.32
  5. Step 5: Solve for x
    x = 4,581,815,413.32/72,029.04
  6. Step 6: Final answer
    x = 63,610.67

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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.