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Finding the Fourth Proportional to 230,888.72, 318,623.41 and 128,915.92

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Solution

The fourth proportional to 230,888.72, 318,623.41 and 128,915.92 is: 177,902.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,888.72 : 318,623.41 = 128,915.92 : x
  2. Step 2: Convert to fraction form
    230,888.72/318,623.41 = 128,915.92/x
  3. Step 3: Cross multiply
    230,888.72x = 318,623.41 × 128,915.92
  4. Step 4: Simplify right side
    230,888.72x = 41,075,630,033.69
  5. Step 5: Solve for x
    x = 41,075,630,033.69/230,888.72
  6. Step 6: Final answer
    x = 177,902.28

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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.