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Finding the Fourth Proportional to 230,889.55, 318,624.45 and 128,916.58

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Solution

The fourth proportional to 230,889.55, 318,624.45 and 128,916.58 is: 177,903.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,889.55 : 318,624.45 = 128,916.58 : x
  2. Step 2: Convert to fraction form
    230,889.55/318,624.45 = 128,916.58/x
  3. Step 3: Cross multiply
    230,889.55x = 318,624.45 × 128,916.58
  4. Step 4: Simplify right side
    230,889.55x = 41,075,974,398.38
  5. Step 5: Solve for x
    x = 41,075,974,398.38/230,889.55
  6. Step 6: Final answer
    x = 177,903.13

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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.