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Finding the Fourth Proportional to 230,973, 318,742.90 and 124,989

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Solution

The fourth proportional to 230,973, 318,742.90 and 124,989 is: 172,484.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,973 : 318,742.90 = 124,989 : x
  2. Step 2: Convert to fraction form
    230,973/318,742.90 = 124,989/x
  3. Step 3: Cross multiply
    230,973x = 318,742.90 × 124,989
  4. Step 4: Simplify right side
    230,973x = 39,839,356,328.10
  5. Step 5: Solve for x
    x = 39,839,356,328.10/230,973
  6. Step 6: Final answer
    x = 172,484.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.