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Finding the Fourth Proportional to 86,790.89, 119,765.77 and 48,543.81

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Solution

The fourth proportional to 86,790.89, 119,765.77 and 48,543.81 is: 66,987.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,790.89 : 119,765.77 = 48,543.81 : x
  2. Step 2: Convert to fraction form
    86,790.89/119,765.77 = 48,543.81/x
  3. Step 3: Cross multiply
    86,790.89x = 119,765.77 × 48,543.81
  4. Step 4: Simplify right side
    86,790.89x = 5,813,886,483.97
  5. Step 5: Solve for x
    x = 5,813,886,483.97/86,790.89
  6. Step 6: Final answer
    x = 66,987.29

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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.