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Finding the Fourth Proportional to 128,058.96, 191,832.48 and 87,980.16

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Solution

The fourth proportional to 128,058.96, 191,832.48 and 87,980.16 is: 131,794.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,058.96 : 191,832.48 = 87,980.16 : x
  2. Step 2: Convert to fraction form
    128,058.96/191,832.48 = 87,980.16/x
  3. Step 3: Cross multiply
    128,058.96x = 191,832.48 × 87,980.16
  4. Step 4: Simplify right side
    128,058.96x = 16,877,452,283.60
  5. Step 5: Solve for x
    x = 16,877,452,283.60/128,058.96
  6. Step 6: Final answer
    x = 131,794.39

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1.5x scale

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.