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Finding the Fourth Proportional to 287,377.65, 431,066.48 and 87,699.06

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Solution

The fourth proportional to 287,377.65, 431,066.48 and 87,699.06 is: 131,548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,377.65 : 431,066.48 = 87,699.06 : x
  2. Step 2: Convert to fraction form
    287,377.65/431,066.48 = 87,699.06/x
  3. Step 3: Cross multiply
    287,377.65x = 431,066.48 × 87,699.06
  4. Step 4: Simplify right side
    287,377.65x = 37,804,124,655.01
  5. Step 5: Solve for x
    x = 37,804,124,655.01/287,377.65
  6. Step 6: Final answer
    x = 131,548.59

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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.