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Finding the Fourth Proportional to 128,213.92, 176,931.84 and 70,852.96

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Solution

The fourth proportional to 128,213.92, 176,931.84 and 70,852.96 is: 97,775.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.92 : 176,931.84 = 70,852.96 : x
  2. Step 2: Convert to fraction form
    128,213.92/176,931.84 = 70,852.96/x
  3. Step 3: Cross multiply
    128,213.92x = 176,931.84 × 70,852.96
  4. Step 4: Simplify right side
    128,213.92x = 12,536,144,582.25
  5. Step 5: Solve for x
    x = 12,536,144,582.25/128,213.92
  6. Step 6: Final answer
    x = 97,775.22

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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.