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Finding the Fourth Proportional to 85,678.81, 118,237.69 and 47,439.06

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Solution

The fourth proportional to 85,678.81, 118,237.69 and 47,439.06 is: 65,466.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,678.81 : 118,237.69 = 47,439.06 : x
  2. Step 2: Convert to fraction form
    85,678.81/118,237.69 = 47,439.06/x
  3. Step 3: Cross multiply
    85,678.81x = 118,237.69 × 47,439.06
  4. Step 4: Simplify right side
    85,678.81x = 5,609,084,733.22
  5. Step 5: Solve for x
    x = 5,609,084,733.22/85,678.81
  6. Step 6: Final answer
    x = 65,466.42

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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.