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Finding the Fourth Proportional to 287,079.99, 430,340.59 and 137,281.42

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Solution

The fourth proportional to 287,079.99, 430,340.59 and 137,281.42 is: 205,788.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,079.99 : 430,340.59 = 137,281.42 : x
  2. Step 2: Convert to fraction form
    287,079.99/430,340.59 = 137,281.42/x
  3. Step 3: Cross multiply
    287,079.99x = 430,340.59 × 137,281.42
  4. Step 4: Simplify right side
    287,079.99x = 59,077,767,278.84
  5. Step 5: Solve for x
    x = 59,077,767,278.84/287,079.99
  6. Step 6: Final answer
    x = 205,788.52

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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.