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Finding the Fourth Proportional to 153,246.65, 211,489.88 and 85,278.78

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Solution

The fourth proportional to 153,246.65, 211,489.88 and 85,278.78 is: 117,690.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,246.65 : 211,489.88 = 85,278.78 : x
  2. Step 2: Convert to fraction form
    153,246.65/211,489.88 = 85,278.78/x
  3. Step 3: Cross multiply
    153,246.65x = 211,489.88 × 85,278.78
  4. Step 4: Simplify right side
    153,246.65x = 18,035,598,522.35
  5. Step 5: Solve for x
    x = 18,035,598,522.35/153,246.65
  6. Step 6: Final answer
    x = 117,690.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.