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Finding the Fourth Proportional to 128,203.43, 176,931.07 and 70,847.80

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Solution

The fourth proportional to 128,203.43, 176,931.07 and 70,847.80 is: 97,775.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,203.43 : 176,931.07 = 70,847.80 : x
  2. Step 2: Convert to fraction form
    128,203.43/176,931.07 = 70,847.80/x
  3. Step 3: Cross multiply
    128,203.43x = 176,931.07 × 70,847.80
  4. Step 4: Simplify right side
    128,203.43x = 12,535,176,441.70
  5. Step 5: Solve for x
    x = 12,535,176,441.70/128,203.43
  6. Step 6: Final answer
    x = 97,775.68

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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.