Home / 287,389.07-431,083.61-87,710.51

Finding the Fourth Proportional to 287,389.07, 431,083.61 and 87,710.51

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Solution

The fourth proportional to 287,389.07, 431,083.61 and 87,710.51 is: 131,565.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,389.07 : 431,083.61 = 87,710.51 : x
  2. Step 2: Convert to fraction form
    287,389.07/431,083.61 = 87,710.51/x
  3. Step 3: Cross multiply
    287,389.07x = 431,083.61 × 87,710.51
  4. Step 4: Simplify right side
    287,389.07x = 37,810,560,691.77
  5. Step 5: Solve for x
    x = 37,810,560,691.77/287,389.07
  6. Step 6: Final answer
    x = 131,565.76

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1.5x scale

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.