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Finding the Fourth Proportional to 100,762.38, 139,071.33 and 66,710.79

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Solution

The fourth proportional to 100,762.38, 139,071.33 and 66,710.79 is: 92,073.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.38 : 139,071.33 = 66,710.79 : x
  2. Step 2: Convert to fraction form
    100,762.38/139,071.33 = 66,710.79/x
  3. Step 3: Cross multiply
    100,762.38x = 139,071.33 × 66,710.79
  4. Step 4: Simplify right side
    100,762.38x = 9,277,558,290.65
  5. Step 5: Solve for x
    x = 9,277,558,290.65/100,762.38
  6. Step 6: Final answer
    x = 92,073.63

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1.5x scale

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.