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Finding the Fourth Proportional to 128,275.50, 177,021.33 and 70,913.91

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Solution

The fourth proportional to 128,275.50, 177,021.33 and 70,913.91 is: 97,861.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,275.50 : 177,021.33 = 70,913.91 : x
  2. Step 2: Convert to fraction form
    128,275.50/177,021.33 = 70,913.91/x
  3. Step 3: Cross multiply
    128,275.50x = 177,021.33 × 70,913.91
  4. Step 4: Simplify right side
    128,275.50x = 12,553,274,663.70
  5. Step 5: Solve for x
    x = 12,553,274,663.70/128,275.50
  6. Step 6: Final answer
    x = 97,861.83

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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.