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Finding the Fourth Proportional to 128,270.79, 176,998.36 and 70,902.36

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Solution

The fourth proportional to 128,270.79, 176,998.36 and 70,902.36 is: 97,836.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,270.79 : 176,998.36 = 70,902.36 : x
  2. Step 2: Convert to fraction form
    128,270.79/176,998.36 = 70,902.36/x
  3. Step 3: Cross multiply
    128,270.79x = 176,998.36 × 70,902.36
  4. Step 4: Simplify right side
    128,270.79x = 12,549,601,528.11
  5. Step 5: Solve for x
    x = 12,549,601,528.11/128,270.79
  6. Step 6: Final answer
    x = 97,836.78

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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.