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Finding the Fourth Proportional to 104,995.36, 157,337.46 and 86,407.48

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Solution

The fourth proportional to 104,995.36, 157,337.46 and 86,407.48 is: 129,483.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,995.36 : 157,337.46 = 86,407.48 : x
  2. Step 2: Convert to fraction form
    104,995.36/157,337.46 = 86,407.48/x
  3. Step 3: Cross multiply
    104,995.36x = 157,337.46 × 86,407.48
  4. Step 4: Simplify right side
    104,995.36x = 13,595,133,428.20
  5. Step 5: Solve for x
    x = 13,595,133,428.20/104,995.36
  6. Step 6: Final answer
    x = 129,483.18

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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.