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Finding the Fourth Proportional to 86,178.25, 118,927.47 and 47,940.85

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Solution

The fourth proportional to 86,178.25, 118,927.47 and 47,940.85 is: 66,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,178.25 : 118,927.47 = 47,940.85 : x
  2. Step 2: Convert to fraction form
    86,178.25/118,927.47 = 47,940.85/x
  3. Step 3: Cross multiply
    86,178.25x = 118,927.47 × 47,940.85
  4. Step 4: Simplify right side
    86,178.25x = 5,701,484,000.15
  5. Step 5: Solve for x
    x = 5,701,484,000.15/86,178.25
  6. Step 6: Final answer
    x = 66,159.20

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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.