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Finding the Fourth Proportional to 85,678.34, 118,239.80 and 47,437.89

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Solution

The fourth proportional to 85,678.34, 118,239.80 and 47,437.89 is: 65,466.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,678.34 : 118,239.80 = 47,437.89 : x
  2. Step 2: Convert to fraction form
    85,678.34/118,239.80 = 47,437.89/x
  3. Step 3: Cross multiply
    85,678.34x = 118,239.80 × 47,437.89
  4. Step 4: Simplify right side
    85,678.34x = 5,609,046,301.22
  5. Step 5: Solve for x
    x = 5,609,046,301.22/85,678.34
  6. Step 6: Final answer
    x = 65,466.33

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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.