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Finding the Fourth Proportional to 115,122.60, 158,841.54 and 64,821.60

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Solution

The fourth proportional to 115,122.60, 158,841.54 and 64,821.60 is: 89,438.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,122.60 : 158,841.54 = 64,821.60 : x
  2. Step 2: Convert to fraction form
    115,122.60/158,841.54 = 64,821.60/x
  3. Step 3: Cross multiply
    115,122.60x = 158,841.54 × 64,821.60
  4. Step 4: Simplify right side
    115,122.60x = 10,296,362,769.26
  5. Step 5: Solve for x
    x = 10,296,362,769.26/115,122.60
  6. Step 6: Final answer
    x = 89,438.24

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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.