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Finding the Fourth Proportional to 101,783.64, 140,443.20 and 61,470.30

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Solution

The fourth proportional to 101,783.64, 140,443.20 and 61,470.30 is: 84,818.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,783.64 : 140,443.20 = 61,470.30 : x
  2. Step 2: Convert to fraction form
    101,783.64/140,443.20 = 61,470.30/x
  3. Step 3: Cross multiply
    101,783.64x = 140,443.20 × 61,470.30
  4. Step 4: Simplify right side
    101,783.64x = 8,633,085,636.96
  5. Step 5: Solve for x
    x = 8,633,085,636.96/101,783.64
  6. Step 6: Final answer
    x = 84,818.01

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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.