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Finding the Fourth Proportional to 66,819.47, 92,208.47 and 38,140.61

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Solution

The fourth proportional to 66,819.47, 92,208.47 and 38,140.61 is: 52,632.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,819.47 : 92,208.47 = 38,140.61 : x
  2. Step 2: Convert to fraction form
    66,819.47/92,208.47 = 38,140.61/x
  3. Step 3: Cross multiply
    66,819.47x = 92,208.47 × 38,140.61
  4. Step 4: Simplify right side
    66,819.47x = 3,516,887,332.78
  5. Step 5: Solve for x
    x = 3,516,887,332.78/66,819.47
  6. Step 6: Final answer
    x = 52,632.67

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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.