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Finding the Fourth Proportional to 128,082.98, 176,760.43 and 70,730.39

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Solution

The fourth proportional to 128,082.98, 176,760.43 and 70,730.39 is: 97,611.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.98 : 176,760.43 = 70,730.39 : x
  2. Step 2: Convert to fraction form
    128,082.98/176,760.43 = 70,730.39/x
  3. Step 3: Cross multiply
    128,082.98x = 176,760.43 × 70,730.39
  4. Step 4: Simplify right side
    128,082.98x = 12,502,334,415.54
  5. Step 5: Solve for x
    x = 12,502,334,415.54/128,082.98
  6. Step 6: Final answer
    x = 97,611.21

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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.