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Finding the Fourth Proportional to 128,300.56, 177,058.44 and 71,712.04

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Solution

The fourth proportional to 128,300.56, 177,058.44 and 71,712.04 is: 98,964.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,300.56 : 177,058.44 = 71,712.04 : x
  2. Step 2: Convert to fraction form
    128,300.56/177,058.44 = 71,712.04/x
  3. Step 3: Cross multiply
    128,300.56x = 177,058.44 × 71,712.04
  4. Step 4: Simplify right side
    128,300.56x = 12,697,221,931.62
  5. Step 5: Solve for x
    x = 12,697,221,931.62/128,300.56
  6. Step 6: Final answer
    x = 98,964.66

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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.