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Finding the Fourth Proportional to 115,145.37, 158,966.54 and 76,969.58

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Solution

The fourth proportional to 115,145.37, 158,966.54 and 76,969.58 is: 106,262.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,145.37 : 158,966.54 = 76,969.58 : x
  2. Step 2: Convert to fraction form
    115,145.37/158,966.54 = 76,969.58/x
  3. Step 3: Cross multiply
    115,145.37x = 158,966.54 × 76,969.58
  4. Step 4: Simplify right side
    115,145.37x = 12,235,588,407.69
  5. Step 5: Solve for x
    x = 12,235,588,407.69/115,145.37
  6. Step 6: Final answer
    x = 106,262.10

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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.