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Finding the Fourth Proportional to 306,082.10, 459,123.15 and 128,530.10

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Solution

The fourth proportional to 306,082.10, 459,123.15 and 128,530.10 is: 192,795.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,082.10 : 459,123.15 = 128,530.10 : x
  2. Step 2: Convert to fraction form
    306,082.10/459,123.15 = 128,530.10/x
  3. Step 3: Cross multiply
    306,082.10x = 459,123.15 × 128,530.10
  4. Step 4: Simplify right side
    306,082.10x = 59,011,144,381.82
  5. Step 5: Solve for x
    x = 59,011,144,381.82/306,082.10
  6. Step 6: Final answer
    x = 192,795.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.