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Finding the Fourth Proportional to 139,899.81, 193,061.74 and 76,237.63

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Solution

The fourth proportional to 139,899.81, 193,061.74 and 76,237.63 is: 105,207.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,899.81 : 193,061.74 = 76,237.63 : x
  2. Step 2: Convert to fraction form
    139,899.81/193,061.74 = 76,237.63/x
  3. Step 3: Cross multiply
    139,899.81x = 193,061.74 × 76,237.63
  4. Step 4: Simplify right side
    139,899.81x = 14,718,569,501.28
  5. Step 5: Solve for x
    x = 14,718,569,501.28/139,899.81
  6. Step 6: Final answer
    x = 105,207.93

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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.