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Finding the Fourth Proportional to 128,157.49, 176,860.01 and 70,796.65

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Solution

The fourth proportional to 128,157.49, 176,860.01 and 70,796.65 is: 97,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,157.49 : 176,860.01 = 70,796.65 : x
  2. Step 2: Convert to fraction form
    128,157.49/176,860.01 = 70,796.65/x
  3. Step 3: Cross multiply
    128,157.49x = 176,860.01 × 70,796.65
  4. Step 4: Simplify right side
    128,157.49x = 12,521,095,872.98
  5. Step 5: Solve for x
    x = 12,521,095,872.98/128,157.49
  6. Step 6: Final answer
    x = 97,700.85

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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.