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Finding the Fourth Proportional to 128,528, 192,779.04 and 58,388.48

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Solution

The fourth proportional to 128,528, 192,779.04 and 58,388.48 is: 87,576.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528 : 192,779.04 = 58,388.48 : x
  2. Step 2: Convert to fraction form
    128,528/192,779.04 = 58,388.48/x
  3. Step 3: Cross multiply
    128,528x = 192,779.04 × 58,388.48
  4. Step 4: Simplify right side
    128,528x = 11,256,075,121.46
  5. Step 5: Solve for x
    x = 11,256,075,121.46/128,528
  6. Step 6: Final answer
    x = 87,576.83

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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.