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Finding the Fourth Proportional to 286,036.82, 429,124.59 and 86,345.28

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Solution

The fourth proportional to 286,036.82, 429,124.59 and 86,345.28 is: 129,538.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,036.82 : 429,124.59 = 86,345.28 : x
  2. Step 2: Convert to fraction form
    286,036.82/429,124.59 = 86,345.28/x
  3. Step 3: Cross multiply
    286,036.82x = 429,124.59 × 86,345.28
  4. Step 4: Simplify right side
    286,036.82x = 37,052,882,878.44
  5. Step 5: Solve for x
    x = 37,052,882,878.44/286,036.82
  6. Step 6: Final answer
    x = 129,538.86

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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.