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Finding the Fourth Proportional to 287,975.81, 431,779.18 and 119,612.36

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Solution

The fourth proportional to 287,975.81, 431,779.18 and 119,612.36 is: 179,341.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,975.81 : 431,779.18 = 119,612.36 : x
  2. Step 2: Convert to fraction form
    287,975.81/431,779.18 = 119,612.36/x
  3. Step 3: Cross multiply
    287,975.81x = 431,779.18 × 119,612.36
  4. Step 4: Simplify right side
    287,975.81x = 51,646,126,718.66
  5. Step 5: Solve for x
    x = 51,646,126,718.66/287,975.81
  6. Step 6: Final answer
    x = 179,341.89

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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.