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Finding the Fourth Proportional to 100,248.64, 138,280.56 and 64,485.28

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Solution

The fourth proportional to 100,248.64, 138,280.56 and 64,485.28 is: 88,949.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,248.64 : 138,280.56 = 64,485.28 : x
  2. Step 2: Convert to fraction form
    100,248.64/138,280.56 = 64,485.28/x
  3. Step 3: Cross multiply
    100,248.64x = 138,280.56 × 64,485.28
  4. Step 4: Simplify right side
    100,248.64x = 8,917,060,630.16
  5. Step 5: Solve for x
    x = 8,917,060,630.16/100,248.64
  6. Step 6: Final answer
    x = 88,949.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.