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Finding the Fourth Proportional to 115,246.80, 172,913.40 and 45,176.40

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Solution

The fourth proportional to 115,246.80, 172,913.40 and 45,176.40 is: 67,781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,246.80 : 172,913.40 = 45,176.40 : x
  2. Step 2: Convert to fraction form
    115,246.80/172,913.40 = 45,176.40/x
  3. Step 3: Cross multiply
    115,246.80x = 172,913.40 × 45,176.40
  4. Step 4: Simplify right side
    115,246.80x = 7,811,604,923.76
  5. Step 5: Solve for x
    x = 7,811,604,923.76/115,246.80
  6. Step 6: Final answer
    x = 67,781.53

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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.