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Finding the Fourth Proportional to 104,139.65, 143,712.68 and 56,392.98

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Solution

The fourth proportional to 104,139.65, 143,712.68 and 56,392.98 is: 77,822.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,139.65 : 143,712.68 = 56,392.98 : x
  2. Step 2: Convert to fraction form
    104,139.65/143,712.68 = 56,392.98/x
  3. Step 3: Cross multiply
    104,139.65x = 143,712.68 × 56,392.98
  4. Step 4: Simplify right side
    104,139.65x = 8,104,386,007.02
  5. Step 5: Solve for x
    x = 8,104,386,007.02/104,139.65
  6. Step 6: Final answer
    x = 77,822.29

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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.