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Finding the Fourth Proportional to 83,915.40, 125,873.10 and 28,511.40

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Solution

The fourth proportional to 83,915.40, 125,873.10 and 28,511.40 is: 42,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,915.40 : 125,873.10 = 28,511.40 : x
  2. Step 2: Convert to fraction form
    83,915.40/125,873.10 = 28,511.40/x
  3. Step 3: Cross multiply
    83,915.40x = 125,873.10 × 28,511.40
  4. Step 4: Simplify right side
    83,915.40x = 3,588,818,303.34
  5. Step 5: Solve for x
    x = 3,588,818,303.34/83,915.40
  6. Step 6: Final answer
    x = 42,767.10

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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.