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Finding the Fourth Proportional to 86,635.64, 129,880.56 and 42,239.54

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Solution

The fourth proportional to 86,635.64, 129,880.56 and 42,239.54 is: 63,323.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,635.64 : 129,880.56 = 42,239.54 : x
  2. Step 2: Convert to fraction form
    86,635.64/129,880.56 = 42,239.54/x
  3. Step 3: Cross multiply
    86,635.64x = 129,880.56 × 42,239.54
  4. Step 4: Simplify right side
    86,635.64x = 5,486,095,109.34
  5. Step 5: Solve for x
    x = 5,486,095,109.34/86,635.64
  6. Step 6: Final answer
    x = 63,323.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.