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Finding the Fourth Proportional to 256,637.76, 385,023.06 and 79,140.84

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Solution

The fourth proportional to 256,637.76, 385,023.06 and 79,140.84 is: 118,731.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,637.76 : 385,023.06 = 79,140.84 : x
  2. Step 2: Convert to fraction form
    256,637.76/385,023.06 = 79,140.84/x
  3. Step 3: Cross multiply
    256,637.76x = 385,023.06 × 79,140.84
  4. Step 4: Simplify right side
    256,637.76x = 30,471,048,387.77
  5. Step 5: Solve for x
    x = 30,471,048,387.77/256,637.76
  6. Step 6: Final answer
    x = 118,731.74

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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.