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Finding the Fourth Proportional to 86,289.35, 119,111.80 and 50,490.89

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Solution

The fourth proportional to 86,289.35, 119,111.80 and 50,490.89 is: 69,696.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289.35 : 119,111.80 = 50,490.89 : x
  2. Step 2: Convert to fraction form
    86,289.35/119,111.80 = 50,490.89/x
  3. Step 3: Cross multiply
    86,289.35x = 119,111.80 × 50,490.89
  4. Step 4: Simplify right side
    86,289.35x = 6,014,060,791.50
  5. Step 5: Solve for x
    x = 6,014,060,791.50/86,289.35
  6. Step 6: Final answer
    x = 69,696.45

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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.