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Finding the Fourth Proportional to 210,317.80, 315,476.70 and 121,744.30

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Solution

The fourth proportional to 210,317.80, 315,476.70 and 121,744.30 is: 182,616.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,317.80 : 315,476.70 = 121,744.30 : x
  2. Step 2: Convert to fraction form
    210,317.80/315,476.70 = 121,744.30/x
  3. Step 3: Cross multiply
    210,317.80x = 315,476.70 × 121,744.30
  4. Step 4: Simplify right side
    210,317.80x = 38,407,490,007.81
  5. Step 5: Solve for x
    x = 38,407,490,007.81/210,317.80
  6. Step 6: Final answer
    x = 182,616.45

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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.