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Finding the Fourth Proportional to 84,413.52, 116,447.88 and 78,410.16

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Solution

The fourth proportional to 84,413.52, 116,447.88 and 78,410.16 is: 108,166.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,413.52 : 116,447.88 = 78,410.16 : x
  2. Step 2: Convert to fraction form
    84,413.52/116,447.88 = 78,410.16/x
  3. Step 3: Cross multiply
    84,413.52x = 116,447.88 × 78,410.16
  4. Step 4: Simplify right side
    84,413.52x = 9,130,696,902.46
  5. Step 5: Solve for x
    x = 9,130,696,902.46/84,413.52
  6. Step 6: Final answer
    x = 108,166.29

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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.