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Finding the Fourth Proportional to 115,292.50, 159,106.08 and 64,991.50

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Solution

The fourth proportional to 115,292.50, 159,106.08 and 64,991.50 is: 89,689.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,292.50 : 159,106.08 = 64,991.50 : x
  2. Step 2: Convert to fraction form
    115,292.50/159,106.08 = 64,991.50/x
  3. Step 3: Cross multiply
    115,292.50x = 159,106.08 × 64,991.50
  4. Step 4: Simplify right side
    115,292.50x = 10,340,542,798.32
  5. Step 5: Solve for x
    x = 10,340,542,798.32/115,292.50
  6. Step 6: Final answer
    x = 89,689.64

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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.