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Finding the Fourth Proportional to 235,915.84, 325,567.57 and 128,485.79

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Solution

The fourth proportional to 235,915.84, 325,567.57 and 128,485.79 is: 177,312.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,915.84 : 325,567.57 = 128,485.79 : x
  2. Step 2: Convert to fraction form
    235,915.84/325,567.57 = 128,485.79/x
  3. Step 3: Cross multiply
    235,915.84x = 325,567.57 × 128,485.79
  4. Step 4: Simplify right side
    235,915.84x = 41,830,806,429.83
  5. Step 5: Solve for x
    x = 41,830,806,429.83/235,915.84
  6. Step 6: Final answer
    x = 177,312.41

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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.