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Finding the Fourth Proportional to 121,862.81, 168,167.54 and 67,413.56

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Solution

The fourth proportional to 121,862.81, 168,167.54 and 67,413.56 is: 93,028.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,862.81 : 168,167.54 = 67,413.56 : x
  2. Step 2: Convert to fraction form
    121,862.81/168,167.54 = 67,413.56/x
  3. Step 3: Cross multiply
    121,862.81x = 168,167.54 × 67,413.56
  4. Step 4: Simplify right side
    121,862.81x = 11,336,772,547.84
  5. Step 5: Solve for x
    x = 11,336,772,547.84/121,862.81
  6. Step 6: Final answer
    x = 93,028.98

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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.