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Finding the Fourth Proportional to 86,955.60, 130,627.80 and 83,413.20

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Solution

The fourth proportional to 86,955.60, 130,627.80 and 83,413.20 is: 125,306.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,955.60 : 130,627.80 = 83,413.20 : x
  2. Step 2: Convert to fraction form
    86,955.60/130,627.80 = 83,413.20/x
  3. Step 3: Cross multiply
    86,955.60x = 130,627.80 × 83,413.20
  4. Step 4: Simplify right side
    86,955.60x = 10,896,082,806.96
  5. Step 5: Solve for x
    x = 10,896,082,806.96/86,955.60
  6. Step 6: Final answer
    x = 125,306.28

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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.