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Finding the Fourth Proportional to 128,040.66, 176,679.81 and 71,454.42

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Solution

The fourth proportional to 128,040.66, 176,679.81 and 71,454.42 is: 98,598.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,040.66 : 176,679.81 = 71,454.42 : x
  2. Step 2: Convert to fraction form
    128,040.66/176,679.81 = 71,454.42/x
  3. Step 3: Cross multiply
    128,040.66x = 176,679.81 × 71,454.42
  4. Step 4: Simplify right side
    128,040.66x = 12,624,553,349.26
  5. Step 5: Solve for x
    x = 12,624,553,349.26/128,040.66
  6. Step 6: Final answer
    x = 98,598.00

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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.