Home / 137,413.28-205,660.64-78,233.06

Finding the Fourth Proportional to 137,413.28, 205,660.64 and 78,233.06

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Solution

The fourth proportional to 137,413.28, 205,660.64 and 78,233.06 is: 117,088.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,413.28 : 205,660.64 = 78,233.06 : x
  2. Step 2: Convert to fraction form
    137,413.28/205,660.64 = 78,233.06/x
  3. Step 3: Cross multiply
    137,413.28x = 205,660.64 × 78,233.06
  4. Step 4: Simplify right side
    137,413.28x = 16,089,459,769.29
  5. Step 5: Solve for x
    x = 16,089,459,769.29/137,413.28
  6. Step 6: Final answer
    x = 117,088.10

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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.