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Finding the Fourth Proportional to 117,915.20, 176,872.80 and 80,590.40

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Solution

The fourth proportional to 117,915.20, 176,872.80 and 80,590.40 is: 120,885.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,915.20 : 176,872.80 = 80,590.40 : x
  2. Step 2: Convert to fraction form
    117,915.20/176,872.80 = 80,590.40/x
  3. Step 3: Cross multiply
    117,915.20x = 176,872.80 × 80,590.40
  4. Step 4: Simplify right side
    117,915.20x = 14,254,249,701.12
  5. Step 5: Solve for x
    x = 14,254,249,701.12/117,915.20
  6. Step 6: Final answer
    x = 120,885.60

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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.