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Finding the Fourth Proportional to 128,076.08, 176,747.77 and 70,715.21

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Solution

The fourth proportional to 128,076.08, 176,747.77 and 70,715.21 is: 97,588.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,076.08 : 176,747.77 = 70,715.21 : x
  2. Step 2: Convert to fraction form
    128,076.08/176,747.77 = 70,715.21/x
  3. Step 3: Cross multiply
    128,076.08x = 176,747.77 × 70,715.21
  4. Step 4: Simplify right side
    128,076.08x = 12,498,754,435.27
  5. Step 5: Solve for x
    x = 12,498,754,435.27/128,076.08
  6. Step 6: Final answer
    x = 97,588.52

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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.