Home / 83,385.69-115,089.63-76,660.66

Finding the Fourth Proportional to 83,385.69, 115,089.63 and 76,660.66

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Solution

The fourth proportional to 83,385.69, 115,089.63 and 76,660.66 is: 105,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,385.69 : 115,089.63 = 76,660.66 : x
  2. Step 2: Convert to fraction form
    83,385.69/115,089.63 = 76,660.66/x
  3. Step 3: Cross multiply
    83,385.69x = 115,089.63 × 76,660.66
  4. Step 4: Simplify right side
    83,385.69x = 8,822,846,851.34
  5. Step 5: Solve for x
    x = 8,822,846,851.34/83,385.69
  6. Step 6: Final answer
    x = 105,807.69

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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.