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Finding the Fourth Proportional to 159,421.60, 239,132.40 and 109,655.20

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Solution

The fourth proportional to 159,421.60, 239,132.40 and 109,655.20 is: 164,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,421.60 : 239,132.40 = 109,655.20 : x
  2. Step 2: Convert to fraction form
    159,421.60/239,132.40 = 109,655.20/x
  3. Step 3: Cross multiply
    159,421.60x = 239,132.40 × 109,655.20
  4. Step 4: Simplify right side
    159,421.60x = 26,222,111,148.48
  5. Step 5: Solve for x
    x = 26,222,111,148.48/159,421.60
  6. Step 6: Final answer
    x = 164,482.80

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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.