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Finding the Fourth Proportional to 104,728.70, 144,528.71 and 56,985.14

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Solution

The fourth proportional to 104,728.70, 144,528.71 and 56,985.14 is: 78,641.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,728.70 : 144,528.71 = 56,985.14 : x
  2. Step 2: Convert to fraction form
    104,728.70/144,528.71 = 56,985.14/x
  3. Step 3: Cross multiply
    104,728.70x = 144,528.71 × 56,985.14
  4. Step 4: Simplify right side
    104,728.70x = 8,235,988,849.77
  5. Step 5: Solve for x
    x = 8,235,988,849.77/104,728.70
  6. Step 6: Final answer
    x = 78,641.18

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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.