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Finding the Fourth Proportional to 128,209.59, 176,939.55 and 70,853.94

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Solution

The fourth proportional to 128,209.59, 176,939.55 and 70,853.94 is: 97,784.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,209.59 : 176,939.55 = 70,853.94 : x
  2. Step 2: Convert to fraction form
    128,209.59/176,939.55 = 70,853.94/x
  3. Step 3: Cross multiply
    128,209.59x = 176,939.55 × 70,853.94
  4. Step 4: Simplify right side
    128,209.59x = 12,536,864,259.33
  5. Step 5: Solve for x
    x = 12,536,864,259.33/128,209.59
  6. Step 6: Final answer
    x = 97,784.14

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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.