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Finding the Fourth Proportional to 235,802.84, 325,413.74 and 128,378.77

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Solution

The fourth proportional to 235,802.84, 325,413.74 and 128,378.77 is: 177,165.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,802.84 : 325,413.74 = 128,378.77 : x
  2. Step 2: Convert to fraction form
    235,802.84/325,413.74 = 128,378.77/x
  3. Step 3: Cross multiply
    235,802.84x = 325,413.74 × 128,378.77
  4. Step 4: Simplify right side
    235,802.84x = 41,776,215,189.71
  5. Step 5: Solve for x
    x = 41,776,215,189.71/235,802.84
  6. Step 6: Final answer
    x = 177,165.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.