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Finding the Fourth Proportional to 147,798.78, 221,493.78 and 128,028.30

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Solution

The fourth proportional to 147,798.78, 221,493.78 and 128,028.30 is: 191,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,798.78 : 221,493.78 = 128,028.30 : x
  2. Step 2: Convert to fraction form
    147,798.78/221,493.78 = 128,028.30/x
  3. Step 3: Cross multiply
    147,798.78x = 221,493.78 × 128,028.30
  4. Step 4: Simplify right side
    147,798.78x = 28,357,472,113.97
  5. Step 5: Solve for x
    x = 28,357,472,113.97/147,798.78
  6. Step 6: Final answer
    x = 191,865.40

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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.