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Finding the Fourth Proportional to 68,686.40, 103,029.60 and 42,442.40

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Solution

The fourth proportional to 68,686.40, 103,029.60 and 42,442.40 is: 63,663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,686.40 : 103,029.60 = 42,442.40 : x
  2. Step 2: Convert to fraction form
    68,686.40/103,029.60 = 42,442.40/x
  3. Step 3: Cross multiply
    68,686.40x = 103,029.60 × 42,442.40
  4. Step 4: Simplify right side
    68,686.40x = 4,372,823,495.04
  5. Step 5: Solve for x
    x = 4,372,823,495.04/68,686.40
  6. Step 6: Final answer
    x = 63,663.60

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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.