Home / 68,137.32-102,218.36-28,156.40

Finding the Fourth Proportional to 68,137.32, 102,218.36 and 28,156.40

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Solution

The fourth proportional to 68,137.32, 102,218.36 and 28,156.40 is: 42,239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,137.32 : 102,218.36 = 28,156.40 : x
  2. Step 2: Convert to fraction form
    68,137.32/102,218.36 = 28,156.40/x
  3. Step 3: Cross multiply
    68,137.32x = 102,218.36 × 28,156.40
  4. Step 4: Simplify right side
    68,137.32x = 2,878,101,031.50
  5. Step 5: Solve for x
    x = 2,878,101,031.50/68,137.32
  6. Step 6: Final answer
    x = 42,239.72

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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.