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Finding the Fourth Proportional to 58,886.51, 81,256.01 and 39,807.80

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Solution

The fourth proportional to 58,886.51, 81,256.01 and 39,807.80 is: 54,929.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,886.51 : 81,256.01 = 39,807.80 : x
  2. Step 2: Convert to fraction form
    58,886.51/81,256.01 = 39,807.80/x
  3. Step 3: Cross multiply
    58,886.51x = 81,256.01 × 39,807.80
  4. Step 4: Simplify right side
    58,886.51x = 3,234,622,389.56
  5. Step 5: Solve for x
    x = 3,234,622,389.56/58,886.51
  6. Step 6: Final answer
    x = 54,929.77

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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.