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Finding the Fourth Proportional to 58,357.30, 87,551.46 and 20,921.16

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Solution

The fourth proportional to 58,357.30, 87,551.46 and 20,921.16 is: 31,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,357.30 : 87,551.46 = 20,921.16 : x
  2. Step 2: Convert to fraction form
    58,357.30/87,551.46 = 20,921.16/x
  3. Step 3: Cross multiply
    58,357.30x = 87,551.46 × 20,921.16
  4. Step 4: Simplify right side
    58,357.30x = 1,831,678,102.89
  5. Step 5: Solve for x
    x = 1,831,678,102.89/58,357.30
  6. Step 6: Final answer
    x = 31,387.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.