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Finding the Fourth Proportional to 128,165.83, 176,868.25 and 70,805.17

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Solution

The fourth proportional to 128,165.83, 176,868.25 and 70,805.17 is: 97,710.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,165.83 : 176,868.25 = 70,805.17 : x
  2. Step 2: Convert to fraction form
    128,165.83/176,868.25 = 70,805.17/x
  3. Step 3: Cross multiply
    128,165.83x = 176,868.25 × 70,805.17
  4. Step 4: Simplify right side
    128,165.83x = 12,523,186,508.85
  5. Step 5: Solve for x
    x = 12,523,186,508.85/128,165.83
  6. Step 6: Final answer
    x = 97,710.81

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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.