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Finding the Fourth Proportional to 115,509.28, 159,402.78 and 65,208.28

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Solution

The fourth proportional to 115,509.28, 159,402.78 and 65,208.28 is: 89,987.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,509.28 : 159,402.78 = 65,208.28 : x
  2. Step 2: Convert to fraction form
    115,509.28/159,402.78 = 65,208.28/x
  3. Step 3: Cross multiply
    115,509.28x = 159,402.78 × 65,208.28
  4. Step 4: Simplify right side
    115,509.28x = 10,394,381,111.02
  5. Step 5: Solve for x
    x = 10,394,381,111.02/115,509.28
  6. Step 6: Final answer
    x = 89,987.41

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1.5x scale

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.