Home / 230,889.11-318,623.95-128,916.30

Finding the Fourth Proportional to 230,889.11, 318,623.95 and 128,916.30

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Solution

The fourth proportional to 230,889.11, 318,623.95 and 128,916.30 is: 177,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,889.11 : 318,623.95 = 128,916.30 : x
  2. Step 2: Convert to fraction form
    230,889.11/318,623.95 = 128,916.30/x
  3. Step 3: Cross multiply
    230,889.11x = 318,623.95 × 128,916.30
  4. Step 4: Simplify right side
    230,889.11x = 41,075,820,080.80
  5. Step 5: Solve for x
    x = 41,075,820,080.80/230,889.11
  6. Step 6: Final answer
    x = 177,902.81

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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.