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Finding the Fourth Proportional to 230,888.30, 318,622.83 and 128,915.49

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Solution

The fourth proportional to 230,888.30, 318,622.83 and 128,915.49 is: 177,901.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,888.30 : 318,622.83 = 128,915.49 : x
  2. Step 2: Convert to fraction form
    230,888.30/318,622.83 = 128,915.49/x
  3. Step 3: Cross multiply
    230,888.30x = 318,622.83 × 128,915.49
  4. Step 4: Simplify right side
    230,888.30x = 41,075,418,254.64
  5. Step 5: Solve for x
    x = 41,075,418,254.64/230,888.30
  6. Step 6: Final answer
    x = 177,901.69

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1.5x scale

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.