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Finding the Fourth Proportional to 147,775.80, 221,663.70 and 128,530.20

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Solution

The fourth proportional to 147,775.80, 221,663.70 and 128,530.20 is: 192,795.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,775.80 : 221,663.70 = 128,530.20 : x
  2. Step 2: Convert to fraction form
    147,775.80/221,663.70 = 128,530.20/x
  3. Step 3: Cross multiply
    147,775.80x = 221,663.70 × 128,530.20
  4. Step 4: Simplify right side
    147,775.80x = 28,490,479,693.74
  5. Step 5: Solve for x
    x = 28,490,479,693.74/147,775.80
  6. Step 6: Final answer
    x = 192,795.30

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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.