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Finding the Fourth Proportional to 211,627.78, 317,488.71 and 99,248.11

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Solution

The fourth proportional to 211,627.78, 317,488.71 and 99,248.11 is: 148,894.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,627.78 : 317,488.71 = 99,248.11 : x
  2. Step 2: Convert to fraction form
    211,627.78/317,488.71 = 99,248.11/x
  3. Step 3: Cross multiply
    211,627.78x = 317,488.71 × 99,248.11
  4. Step 4: Simplify right side
    211,627.78x = 31,510,154,413.84
  5. Step 5: Solve for x
    x = 31,510,154,413.84/211,627.78
  6. Step 6: Final answer
    x = 148,894.23

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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.