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Finding the Fourth Proportional to 85,679.73, 118,280.93 and 53,866.17

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Solution

The fourth proportional to 85,679.73, 118,280.93 and 53,866.17 is: 74,362.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,679.73 : 118,280.93 = 53,866.17 : x
  2. Step 2: Convert to fraction form
    85,679.73/118,280.93 = 53,866.17/x
  3. Step 3: Cross multiply
    85,679.73x = 118,280.93 × 53,866.17
  4. Step 4: Simplify right side
    85,679.73x = 6,371,340,413.81
  5. Step 5: Solve for x
    x = 6,371,340,413.81/85,679.73
  6. Step 6: Final answer
    x = 74,362.28

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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.