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Finding the Fourth Proportional to 235,808.54, 325,421.63 and 128,384.46

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Solution

The fourth proportional to 235,808.54, 325,421.63 and 128,384.46 is: 177,173.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,808.54 : 325,421.63 = 128,384.46 : x
  2. Step 2: Convert to fraction form
    235,808.54/325,421.63 = 128,384.46/x
  3. Step 3: Cross multiply
    235,808.54x = 325,421.63 × 128,384.46
  4. Step 4: Simplify right side
    235,808.54x = 41,779,079,597.95
  5. Step 5: Solve for x
    x = 41,779,079,597.95/235,808.54
  6. Step 6: Final answer
    x = 177,173.74

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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.