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Finding the Fourth Proportional to 210,077.80, 315,116.70 and 121,504.30

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Solution

The fourth proportional to 210,077.80, 315,116.70 and 121,504.30 is: 182,256.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,077.80 : 315,116.70 = 121,504.30 : x
  2. Step 2: Convert to fraction form
    210,077.80/315,116.70 = 121,504.30/x
  3. Step 3: Cross multiply
    210,077.80x = 315,116.70 × 121,504.30
  4. Step 4: Simplify right side
    210,077.80x = 38,288,034,051.81
  5. Step 5: Solve for x
    x = 38,288,034,051.81/210,077.80
  6. Step 6: Final answer
    x = 182,256.45

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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.