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Finding the Fourth Proportional to 93,002.70, 139,212.45 and 66,758.70

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Solution

The fourth proportional to 93,002.70, 139,212.45 and 66,758.70 is: 99,928.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,002.70 : 139,212.45 = 66,758.70 : x
  2. Step 2: Convert to fraction form
    93,002.70/139,212.45 = 66,758.70/x
  3. Step 3: Cross multiply
    93,002.70x = 139,212.45 × 66,758.70
  4. Step 4: Simplify right side
    93,002.70x = 9,293,642,185.82
  5. Step 5: Solve for x
    x = 9,293,642,185.82/93,002.70
  6. Step 6: Final answer
    x = 99,928.74

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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.