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Finding the Fourth Proportional to 159,643.60, 239,263.80 and 80,779.60

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Solution

The fourth proportional to 159,643.60, 239,263.80 and 80,779.60 is: 121,067.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,643.60 : 239,263.80 = 80,779.60 : x
  2. Step 2: Convert to fraction form
    159,643.60/239,263.80 = 80,779.60/x
  3. Step 3: Cross multiply
    159,643.60x = 239,263.80 × 80,779.60
  4. Step 4: Simplify right side
    159,643.60x = 19,327,634,058.48
  5. Step 5: Solve for x
    x = 19,327,634,058.48/159,643.60
  6. Step 6: Final answer
    x = 121,067.39

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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.