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Finding the Fourth Proportional to 85,856.86, 118,482.81 and 47,619.98

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Solution

The fourth proportional to 85,856.86, 118,482.81 and 47,619.98 is: 65,715.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,856.86 : 118,482.81 = 47,619.98 : x
  2. Step 2: Convert to fraction form
    85,856.86/118,482.81 = 47,619.98/x
  3. Step 3: Cross multiply
    85,856.86x = 118,482.81 × 47,619.98
  4. Step 4: Simplify right side
    85,856.86x = 5,642,148,450.13
  5. Step 5: Solve for x
    x = 5,642,148,450.13/85,856.86
  6. Step 6: Final answer
    x = 65,715.76

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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.