Home / 80,915.16-121,424.58-39,339.48

Finding the Fourth Proportional to 80,915.16, 121,424.58 and 39,339.48

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Solution

The fourth proportional to 80,915.16, 121,424.58 and 39,339.48 is: 59,034.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,915.16 : 121,424.58 = 39,339.48 : x
  2. Step 2: Convert to fraction form
    80,915.16/121,424.58 = 39,339.48/x
  3. Step 3: Cross multiply
    80,915.16x = 121,424.58 × 39,339.48
  4. Step 4: Simplify right side
    80,915.16x = 4,776,779,836.42
  5. Step 5: Solve for x
    x = 4,776,779,836.42/80,915.16
  6. Step 6: Final answer
    x = 59,034.42

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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.