Home / 287,529.49-431,298.70-85,146.06

Finding the Fourth Proportional to 287,529.49, 431,298.70 and 85,146.06

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Solution

The fourth proportional to 287,529.49, 431,298.70 and 85,146.06 is: 127,720.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,529.49 : 431,298.70 = 85,146.06 : x
  2. Step 2: Convert to fraction form
    287,529.49/431,298.70 = 85,146.06/x
  3. Step 3: Cross multiply
    287,529.49x = 431,298.70 × 85,146.06
  4. Step 4: Simplify right side
    287,529.49x = 36,723,386,871.57
  5. Step 5: Solve for x
    x = 36,723,386,871.57/287,529.49
  6. Step 6: Final answer
    x = 127,720.42

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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.