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Finding the Fourth Proportional to 86,389.86, 119,240.28 and 56,250.48

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Solution

The fourth proportional to 86,389.86, 119,240.28 and 56,250.48 is: 77,640.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,389.86 : 119,240.28 = 56,250.48 : x
  2. Step 2: Convert to fraction form
    86,389.86/119,240.28 = 56,250.48/x
  3. Step 3: Cross multiply
    86,389.86x = 119,240.28 × 56,250.48
  4. Step 4: Simplify right side
    86,389.86x = 6,707,322,985.33
  5. Step 5: Solve for x
    x = 6,707,322,985.33/86,389.86
  6. Step 6: Final answer
    x = 77,640.17

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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.