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Finding the Fourth Proportional to 287,673.15, 431,463.06 and 135,870.06

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Solution

The fourth proportional to 287,673.15, 431,463.06 and 135,870.06 is: 203,783.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,673.15 : 431,463.06 = 135,870.06 : x
  2. Step 2: Convert to fraction form
    287,673.15/431,463.06 = 135,870.06/x
  3. Step 3: Cross multiply
    287,673.15x = 431,463.06 × 135,870.06
  4. Step 4: Simplify right side
    287,673.15x = 58,622,911,849.98
  5. Step 5: Solve for x
    x = 58,622,911,849.98/287,673.15
  6. Step 6: Final answer
    x = 203,783.05

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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.