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Finding the Fourth Proportional to 245,643.24, 368,633.97 and 85,720.08

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Solution

The fourth proportional to 245,643.24, 368,633.97 and 85,720.08 is: 128,639.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,643.24 : 368,633.97 = 85,720.08 : x
  2. Step 2: Convert to fraction form
    245,643.24/368,633.97 = 85,720.08/x
  3. Step 3: Cross multiply
    245,643.24x = 368,633.97 × 85,720.08
  4. Step 4: Simplify right side
    245,643.24x = 31,599,333,399.12
  5. Step 5: Solve for x
    x = 31,599,333,399.12/245,643.24
  6. Step 6: Final answer
    x = 128,639.13

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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.