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Finding the Fourth Proportional to 186,915.81, 280,377.68 and 66,980.58

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Solution

The fourth proportional to 186,915.81, 280,377.68 and 66,980.58 is: 100,472.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,915.81 : 280,377.68 = 66,980.58 : x
  2. Step 2: Convert to fraction form
    186,915.81/280,377.68 = 66,980.58/x
  3. Step 3: Cross multiply
    186,915.81x = 280,377.68 × 66,980.58
  4. Step 4: Simplify right side
    186,915.81x = 18,779,859,625.45
  5. Step 5: Solve for x
    x = 18,779,859,625.45/186,915.81
  6. Step 6: Final answer
    x = 100,472.29

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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.