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Finding the Fourth Proportional to 210,318.30, 315,477.45 and 121,744.80

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Solution

The fourth proportional to 210,318.30, 315,477.45 and 121,744.80 is: 182,617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,318.30 : 315,477.45 = 121,744.80 : x
  2. Step 2: Convert to fraction form
    210,318.30/315,477.45 = 121,744.80/x
  3. Step 3: Cross multiply
    210,318.30x = 315,477.45 × 121,744.80
  4. Step 4: Simplify right side
    210,318.30x = 38,407,739,054.76
  5. Step 5: Solve for x
    x = 38,407,739,054.76/210,318.30
  6. Step 6: Final answer
    x = 182,617.20

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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.