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Finding the Fourth Proportional to 287,383.04, 431,141.58 and 87,703.05

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Solution

The fourth proportional to 287,383.04, 431,141.58 and 87,703.05 is: 131,575.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,383.04 : 431,141.58 = 87,703.05 : x
  2. Step 2: Convert to fraction form
    287,383.04/431,141.58 = 87,703.05/x
  3. Step 3: Cross multiply
    287,383.04x = 431,141.58 × 87,703.05
  4. Step 4: Simplify right side
    287,383.04x = 37,812,431,547.82
  5. Step 5: Solve for x
    x = 37,812,431,547.82/287,383.04
  6. Step 6: Final answer
    x = 131,575.03

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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.