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Finding the Fourth Proportional to 172,437.57, 258,580.95 and 86,995.86

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Solution

The fourth proportional to 172,437.57, 258,580.95 and 86,995.86 is: 130,455.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,437.57 : 258,580.95 = 86,995.86 : x
  2. Step 2: Convert to fraction form
    172,437.57/258,580.95 = 86,995.86/x
  3. Step 3: Cross multiply
    172,437.57x = 258,580.95 × 86,995.86
  4. Step 4: Simplify right side
    172,437.57x = 22,495,470,707.89
  5. Step 5: Solve for x
    x = 22,495,470,707.89/172,437.57
  6. Step 6: Final answer
    x = 130,455.74

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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.