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Finding the Fourth Proportional to 140,424.84, 210,689.88 and 72,914.76

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Solution

The fourth proportional to 140,424.84, 210,689.88 and 72,914.76 is: 109,399.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,424.84 : 210,689.88 = 72,914.76 : x
  2. Step 2: Convert to fraction form
    140,424.84/210,689.88 = 72,914.76/x
  3. Step 3: Cross multiply
    140,424.84x = 210,689.88 × 72,914.76
  4. Step 4: Simplify right side
    140,424.84x = 15,362,402,034.63
  5. Step 5: Solve for x
    x = 15,362,402,034.63/140,424.84
  6. Step 6: Final answer
    x = 109,399.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.