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Finding the Fourth Proportional to 153,036.72, 211,191.84 and 85,055.04

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Solution

The fourth proportional to 153,036.72, 211,191.84 and 85,055.04 is: 117,376.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,036.72 : 211,191.84 = 85,055.04 : x
  2. Step 2: Convert to fraction form
    153,036.72/211,191.84 = 85,055.04/x
  3. Step 3: Cross multiply
    153,036.72x = 211,191.84 × 85,055.04
  4. Step 4: Simplify right side
    153,036.72x = 17,962,930,398.87
  5. Step 5: Solve for x
    x = 17,962,930,398.87/153,036.72
  6. Step 6: Final answer
    x = 117,376.60

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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.