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Finding the Fourth Proportional to 427,602.54, 641,223.15 and 128,125.56

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Solution

The fourth proportional to 427,602.54, 641,223.15 and 128,125.56 is: 192,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,602.54 : 641,223.15 = 128,125.56 : x
  2. Step 2: Convert to fraction form
    427,602.54/641,223.15 = 128,125.56/x
  3. Step 3: Cross multiply
    427,602.54x = 641,223.15 × 128,125.56
  4. Step 4: Simplify right side
    427,602.54x = 82,157,075,178.71
  5. Step 5: Solve for x
    x = 82,157,075,178.71/427,602.54
  6. Step 6: Final answer
    x = 192,134.21

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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.