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Finding the Fourth Proportional to 153,801.34, 212,239.92 and 85,814.80

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Solution

The fourth proportional to 153,801.34, 212,239.92 and 85,814.80 is: 118,421.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,801.34 : 212,239.92 = 85,814.80 : x
  2. Step 2: Convert to fraction form
    153,801.34/212,239.92 = 85,814.80/x
  3. Step 3: Cross multiply
    153,801.34x = 212,239.92 × 85,814.80
  4. Step 4: Simplify right side
    153,801.34x = 18,213,326,286.82
  5. Step 5: Solve for x
    x = 18,213,326,286.82/153,801.34
  6. Step 6: Final answer
    x = 118,421.12

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1.5x scale

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.