Home / 287,122.59-430,651.08-76,776.93

Finding the Fourth Proportional to 287,122.59, 430,651.08 and 76,776.93

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Solution

The fourth proportional to 287,122.59, 430,651.08 and 76,776.93 is: 115,156.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,122.59 : 430,651.08 = 76,776.93 : x
  2. Step 2: Convert to fraction form
    287,122.59/430,651.08 = 76,776.93/x
  3. Step 3: Cross multiply
    287,122.59x = 430,651.08 × 76,776.93
  4. Step 4: Simplify right side
    287,122.59x = 33,064,067,823.58
  5. Step 5: Solve for x
    x = 33,064,067,823.58/287,122.59
  6. Step 6: Final answer
    x = 115,156.62

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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.