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Finding the Fourth Proportional to 128,301.48, 177,056.64 and 71,711.64

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Solution

The fourth proportional to 128,301.48, 177,056.64 and 71,711.64 is: 98,962.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.48 : 177,056.64 = 71,711.64 : x
  2. Step 2: Convert to fraction form
    128,301.48/177,056.64 = 71,711.64/x
  3. Step 3: Cross multiply
    128,301.48x = 177,056.64 × 71,711.64
  4. Step 4: Simplify right side
    128,301.48x = 12,697,022,027.29
  5. Step 5: Solve for x
    x = 12,697,022,027.29/128,301.48
  6. Step 6: Final answer
    x = 98,962.40

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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.