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Finding the Fourth Proportional to 211,267.42, 316,915.76 and 84,907.77

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Solution

The fourth proportional to 211,267.42, 316,915.76 and 84,907.77 is: 127,367.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,267.42 : 316,915.76 = 84,907.77 : x
  2. Step 2: Convert to fraction form
    211,267.42/316,915.76 = 84,907.77/x
  3. Step 3: Cross multiply
    211,267.42x = 316,915.76 × 84,907.77
  4. Step 4: Simplify right side
    211,267.42x = 26,908,609,483.29
  5. Step 5: Solve for x
    x = 26,908,609,483.29/211,267.42
  6. Step 6: Final answer
    x = 127,367.53

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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.