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Finding the Fourth Proportional to 128,599.98, 177,463.08 and 72,008.52

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Solution

The fourth proportional to 128,599.98, 177,463.08 and 72,008.52 is: 99,369.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,599.98 : 177,463.08 = 72,008.52 : x
  2. Step 2: Convert to fraction form
    128,599.98/177,463.08 = 72,008.52/x
  3. Step 3: Cross multiply
    128,599.98x = 177,463.08 × 72,008.52
  4. Step 4: Simplify right side
    128,599.98x = 12,778,853,745.44
  5. Step 5: Solve for x
    x = 12,778,853,745.44/128,599.98
  6. Step 6: Final answer
    x = 99,369.02

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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.