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Finding the Fourth Proportional to 86,940.30, 130,544.10 and 47,574.30

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Solution

The fourth proportional to 86,940.30, 130,544.10 and 47,574.30 is: 71,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,940.30 : 130,544.10 = 47,574.30 : x
  2. Step 2: Convert to fraction form
    86,940.30/130,544.10 = 47,574.30/x
  3. Step 3: Cross multiply
    86,940.30x = 130,544.10 × 47,574.30
  4. Step 4: Simplify right side
    86,940.30x = 6,210,544,176.63
  5. Step 5: Solve for x
    x = 6,210,544,176.63/86,940.30
  6. Step 6: Final answer
    x = 71,434.58

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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.