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Finding the Fourth Proportional to 115,133.57, 172,739.57 and 70,244.79

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Solution

The fourth proportional to 115,133.57, 172,739.57 and 70,244.79 is: 105,391.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,133.57 : 172,739.57 = 70,244.79 : x
  2. Step 2: Convert to fraction form
    115,133.57/172,739.57 = 70,244.79/x
  3. Step 3: Cross multiply
    115,133.57x = 172,739.57 × 70,244.79
  4. Step 4: Simplify right side
    115,133.57x = 12,134,054,994.95
  5. Step 5: Solve for x
    x = 12,134,054,994.95/115,133.57
  6. Step 6: Final answer
    x = 105,391.12

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1.5x scale

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.