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Finding the Fourth Proportional to 160,342.80, 240,629.40 and 66,915.60

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Solution

The fourth proportional to 160,342.80, 240,629.40 and 66,915.60 is: 100,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,342.80 : 240,629.40 = 66,915.60 : x
  2. Step 2: Convert to fraction form
    160,342.80/240,629.40 = 66,915.60/x
  3. Step 3: Cross multiply
    160,342.80x = 240,629.40 × 66,915.60
  4. Step 4: Simplify right side
    160,342.80x = 16,101,860,678.64
  5. Step 5: Solve for x
    x = 16,101,860,678.64/160,342.80
  6. Step 6: Final answer
    x = 100,421.48

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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.