Home / 85,821.48-128,686.14-30,410.28

Finding the Fourth Proportional to 85,821.48, 128,686.14 and 30,410.28

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Solution

The fourth proportional to 85,821.48, 128,686.14 and 30,410.28 is: 45,599.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,821.48 : 128,686.14 = 30,410.28 : x
  2. Step 2: Convert to fraction form
    85,821.48/128,686.14 = 30,410.28/x
  3. Step 3: Cross multiply
    85,821.48x = 128,686.14 × 30,410.28
  4. Step 4: Simplify right side
    85,821.48x = 3,913,381,549.52
  5. Step 5: Solve for x
    x = 3,913,381,549.52/85,821.48
  6. Step 6: Final answer
    x = 45,599.09

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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.