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Finding the Fourth Proportional to 187,707.34, 258,916.80 and 123,180.76

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Solution

The fourth proportional to 187,707.34, 258,916.80 and 123,180.76 is: 169,911.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,707.34 : 258,916.80 = 123,180.76 : x
  2. Step 2: Convert to fraction form
    187,707.34/258,916.80 = 123,180.76/x
  3. Step 3: Cross multiply
    187,707.34x = 258,916.80 × 123,180.76
  4. Step 4: Simplify right side
    187,707.34x = 31,893,568,200.77
  5. Step 5: Solve for x
    x = 31,893,568,200.77/187,707.34
  6. Step 6: Final answer
    x = 169,911.14

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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.