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Finding the Fourth Proportional to 86,827.70, 129,461.32 and 79,413.68

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Solution

The fourth proportional to 86,827.70, 129,461.32 and 79,413.68 is: 118,406.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,827.70 : 129,461.32 = 79,413.68 : x
  2. Step 2: Convert to fraction form
    86,827.70/129,461.32 = 79,413.68/x
  3. Step 3: Cross multiply
    86,827.70x = 129,461.32 × 79,413.68
  4. Step 4: Simplify right side
    86,827.70x = 10,280,999,838.86
  5. Step 5: Solve for x
    x = 10,280,999,838.86/86,827.70
  6. Step 6: Final answer
    x = 118,406.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.