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Finding the Fourth Proportional to 104,275.40, 143,900.79 and 56,529.50

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Solution

The fourth proportional to 104,275.40, 143,900.79 and 56,529.50 is: 78,011.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,275.40 : 143,900.79 = 56,529.50 : x
  2. Step 2: Convert to fraction form
    104,275.40/143,900.79 = 56,529.50/x
  3. Step 3: Cross multiply
    104,275.40x = 143,900.79 × 56,529.50
  4. Step 4: Simplify right side
    104,275.40x = 8,134,639,708.31
  5. Step 5: Solve for x
    x = 8,134,639,708.31/104,275.40
  6. Step 6: Final answer
    x = 78,011.11

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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.