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Finding the Fourth Proportional to 128,362.62, 177,141.53 and 71,774.00

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Solution

The fourth proportional to 128,362.62, 177,141.53 and 71,774.00 is: 99,048.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,362.62 : 177,141.53 = 71,774.00 : x
  2. Step 2: Convert to fraction form
    128,362.62/177,141.53 = 71,774.00/x
  3. Step 3: Cross multiply
    128,362.62x = 177,141.53 × 71,774.00
  4. Step 4: Simplify right side
    128,362.62x = 12,714,156,132.23
  5. Step 5: Solve for x
    x = 12,714,156,132.23/128,362.62
  6. Step 6: Final answer
    x = 99,048.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.