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Finding the Fourth Proportional to 212,575.88, 318,908.80 and 70,413.11

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Solution

The fourth proportional to 212,575.88, 318,908.80 and 70,413.11 is: 105,634.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,575.88 : 318,908.80 = 70,413.11 : x
  2. Step 2: Convert to fraction form
    212,575.88/318,908.80 = 70,413.11/x
  3. Step 3: Cross multiply
    212,575.88x = 318,908.80 × 70,413.11
  4. Step 4: Simplify right side
    212,575.88x = 22,455,358,467.76
  5. Step 5: Solve for x
    x = 22,455,358,467.76/212,575.88
  6. Step 6: Final answer
    x = 105,634.55

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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.