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Finding the Fourth Proportional to 86,916.80, 130,413.60 and 40,145.60

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Solution

The fourth proportional to 86,916.80, 130,413.60 and 40,145.60 is: 60,236.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,916.80 : 130,413.60 = 40,145.60 : x
  2. Step 2: Convert to fraction form
    86,916.80/130,413.60 = 40,145.60/x
  3. Step 3: Cross multiply
    86,916.80x = 130,413.60 × 40,145.60
  4. Step 4: Simplify right side
    86,916.80x = 5,235,532,220.16
  5. Step 5: Solve for x
    x = 5,235,532,220.16/86,916.80
  6. Step 6: Final answer
    x = 60,236.14

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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.