Home / 143,413.68-197,915.70-78,885.66

Finding the Fourth Proportional to 143,413.68, 197,915.70 and 78,885.66

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Solution

The fourth proportional to 143,413.68, 197,915.70 and 78,885.66 is: 108,864.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,413.68 : 197,915.70 = 78,885.66 : x
  2. Step 2: Convert to fraction form
    143,413.68/197,915.70 = 78,885.66/x
  3. Step 3: Cross multiply
    143,413.68x = 197,915.70 × 78,885.66
  4. Step 4: Simplify right side
    143,413.68x = 15,612,710,618.86
  5. Step 5: Solve for x
    x = 15,612,710,618.86/143,413.68
  6. Step 6: Final answer
    x = 108,864.86

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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.