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Finding the Fourth Proportional to 66,901.60, 100,352.40 and 42,018.40

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Solution

The fourth proportional to 66,901.60, 100,352.40 and 42,018.40 is: 63,027.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,901.60 : 100,352.40 = 42,018.40 : x
  2. Step 2: Convert to fraction form
    66,901.60/100,352.40 = 42,018.40/x
  3. Step 3: Cross multiply
    66,901.60x = 100,352.40 × 42,018.40
  4. Step 4: Simplify right side
    66,901.60x = 4,216,647,284.16
  5. Step 5: Solve for x
    x = 4,216,647,284.16/66,901.60
  6. Step 6: Final answer
    x = 63,027.60

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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.