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Finding the Fourth Proportional to 72,328.40, 108,413.40 and 25,557.20

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Solution

The fourth proportional to 72,328.40, 108,413.40 and 25,557.20 is: 38,307.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,328.40 : 108,413.40 = 25,557.20 : x
  2. Step 2: Convert to fraction form
    72,328.40/108,413.40 = 25,557.20/x
  3. Step 3: Cross multiply
    72,328.40x = 108,413.40 × 25,557.20
  4. Step 4: Simplify right side
    72,328.40x = 2,770,742,946.48
  5. Step 5: Solve for x
    x = 2,770,742,946.48/72,328.40
  6. Step 6: Final answer
    x = 38,307.81

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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.