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Finding the Fourth Proportional to 103,685.90, 155,413.65 and 56,972.30

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Solution

The fourth proportional to 103,685.90, 155,413.65 and 56,972.30 is: 85,395.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.90 : 155,413.65 = 56,972.30 : x
  2. Step 2: Convert to fraction form
    103,685.90/155,413.65 = 56,972.30/x
  3. Step 3: Cross multiply
    103,685.90x = 155,413.65 × 56,972.30
  4. Step 4: Simplify right side
    103,685.90x = 8,854,273,091.90
  5. Step 5: Solve for x
    x = 8,854,273,091.90/103,685.90
  6. Step 6: Final answer
    x = 85,395.15

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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.