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Finding the Fourth Proportional to 103,698.40, 155,432.40 and 56,984.80

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Solution

The fourth proportional to 103,698.40, 155,432.40 and 56,984.80 is: 85,413.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,698.40 : 155,432.40 = 56,984.80 : x
  2. Step 2: Convert to fraction form
    103,698.40/155,432.40 = 56,984.80/x
  3. Step 3: Cross multiply
    103,698.40x = 155,432.40 × 56,984.80
  4. Step 4: Simplify right side
    103,698.40x = 8,857,284,227.52
  5. Step 5: Solve for x
    x = 8,857,284,227.52/103,698.40
  6. Step 6: Final answer
    x = 85,413.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.