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Finding the Fourth Proportional to 235,915.59, 325,567.21 and 128,485.53

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Solution

The fourth proportional to 235,915.59, 325,567.21 and 128,485.53 is: 177,312.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,915.59 : 325,567.21 = 128,485.53 : x
  2. Step 2: Convert to fraction form
    235,915.59/325,567.21 = 128,485.53/x
  3. Step 3: Cross multiply
    235,915.59x = 325,567.21 × 128,485.53
  4. Step 4: Simplify right side
    235,915.59x = 41,830,675,527.47
  5. Step 5: Solve for x
    x = 41,830,675,527.47/235,915.59
  6. Step 6: Final answer
    x = 177,312.04

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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.