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Finding the Fourth Proportional to 128,163, 176,861.49 and 70,801.08

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Solution

The fourth proportional to 128,163, 176,861.49 and 70,801.08 is: 97,703.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,163 : 176,861.49 = 70,801.08 : x
  2. Step 2: Convert to fraction form
    128,163/176,861.49 = 70,801.08/x
  3. Step 3: Cross multiply
    128,163x = 176,861.49 × 70,801.08
  4. Step 4: Simplify right side
    128,163x = 12,521,984,502.41
  5. Step 5: Solve for x
    x = 12,521,984,502.41/128,163
  6. Step 6: Final answer
    x = 97,703.58

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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.