Home / 85,823.20-128,616.30-61,940.35

Finding the Fourth Proportional to 85,823.20, 128,616.30 and 61,940.35

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Solution

The fourth proportional to 85,823.20, 128,616.30 and 61,940.35 is: 92,825.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,823.20 : 128,616.30 = 61,940.35 : x
  2. Step 2: Convert to fraction form
    85,823.20/128,616.30 = 61,940.35/x
  3. Step 3: Cross multiply
    85,823.20x = 128,616.30 × 61,940.35
  4. Step 4: Simplify right side
    85,823.20x = 7,966,538,637.71
  5. Step 5: Solve for x
    x = 7,966,538,637.71/85,823.20
  6. Step 6: Final answer
    x = 92,825.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.