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Finding the Fourth Proportional to 66,970.64, 100,455.96 and 25,417.64

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Solution

The fourth proportional to 66,970.64, 100,455.96 and 25,417.64 is: 38,126.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,970.64 : 100,455.96 = 25,417.64 : x
  2. Step 2: Convert to fraction form
    66,970.64/100,455.96 = 25,417.64/x
  3. Step 3: Cross multiply
    66,970.64x = 100,455.96 × 25,417.64
  4. Step 4: Simplify right side
    66,970.64x = 2,553,353,427.13
  5. Step 5: Solve for x
    x = 2,553,353,427.13/66,970.64
  6. Step 6: Final answer
    x = 38,126.46

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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.