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Finding the Fourth Proportional to 211,627.55, 317,437.88 and 85,264.76

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Solution

The fourth proportional to 211,627.55, 317,437.88 and 85,264.76 is: 127,895.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,627.55 : 317,437.88 = 85,264.76 : x
  2. Step 2: Convert to fraction form
    211,627.55/317,437.88 = 85,264.76/x
  3. Step 3: Cross multiply
    211,627.55x = 317,437.88 × 85,264.76
  4. Step 4: Simplify right side
    211,627.55x = 27,066,265,020.38
  5. Step 5: Solve for x
    x = 27,066,265,020.38/211,627.55
  6. Step 6: Final answer
    x = 127,895.75

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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.