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Finding the Fourth Proportional to 104,218.61, 143,821.80 and 56,471.94

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Solution

The fourth proportional to 104,218.61, 143,821.80 and 56,471.94 is: 77,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,218.61 : 143,821.80 = 56,471.94 : x
  2. Step 2: Convert to fraction form
    104,218.61/143,821.80 = 56,471.94/x
  3. Step 3: Cross multiply
    104,218.61x = 143,821.80 × 56,471.94
  4. Step 4: Simplify right side
    104,218.61x = 8,121,896,060.29
  5. Step 5: Solve for x
    x = 8,121,896,060.29/104,218.61
  6. Step 6: Final answer
    x = 77,931.34

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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.