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Finding the Fourth Proportional to 230,539.95, 318,138.80 and 128,568.51

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Solution

The fourth proportional to 230,539.95, 318,138.80 and 128,568.51 is: 177,421.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,539.95 : 318,138.80 = 128,568.51 : x
  2. Step 2: Convert to fraction form
    230,539.95/318,138.80 = 128,568.51/x
  3. Step 3: Cross multiply
    230,539.95x = 318,138.80 × 128,568.51
  4. Step 4: Simplify right side
    230,539.95x = 40,902,630,846.35
  5. Step 5: Solve for x
    x = 40,902,630,846.35/230,539.95
  6. Step 6: Final answer
    x = 177,421.01

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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.