Home / 187,011.72-258,063.84-102,128.58

Finding the Fourth Proportional to 187,011.72, 258,063.84 and 102,128.58

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Solution

The fourth proportional to 187,011.72, 258,063.84 and 102,128.58 is: 140,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,011.72 : 258,063.84 = 102,128.58 : x
  2. Step 2: Convert to fraction form
    187,011.72/258,063.84 = 102,128.58/x
  3. Step 3: Cross multiply
    187,011.72x = 258,063.84 × 102,128.58
  4. Step 4: Simplify right side
    187,011.72x = 26,355,693,528.55
  5. Step 5: Solve for x
    x = 26,355,693,528.55/187,011.72
  6. Step 6: Final answer
    x = 140,930.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.