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Finding the Fourth Proportional to 128,334.65, 177,098.81 and 70,972.47

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Solution

The fourth proportional to 128,334.65, 177,098.81 and 70,972.47 is: 97,940.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.65 : 177,098.81 = 70,972.47 : x
  2. Step 2: Convert to fraction form
    128,334.65/177,098.81 = 70,972.47/x
  3. Step 3: Cross multiply
    128,334.65x = 177,098.81 × 70,972.47
  4. Step 4: Simplify right side
    128,334.65x = 12,569,139,624.90
  5. Step 5: Solve for x
    x = 12,569,139,624.90/128,334.65
  6. Step 6: Final answer
    x = 97,940.35

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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.