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Finding the Fourth Proportional to 287,070.59, 430,630.19 and 87,392.63

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Solution

The fourth proportional to 287,070.59, 430,630.19 and 87,392.63 is: 131,096.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,070.59 : 430,630.19 = 87,392.63 : x
  2. Step 2: Convert to fraction form
    287,070.59/430,630.19 = 87,392.63/x
  3. Step 3: Cross multiply
    287,070.59x = 430,630.19 × 87,392.63
  4. Step 4: Simplify right side
    287,070.59x = 37,633,902,271.39
  5. Step 5: Solve for x
    x = 37,633,902,271.39/287,070.59
  6. Step 6: Final answer
    x = 131,096.34

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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.