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Finding the Fourth Proportional to 207,980.64, 287,013.30 and 112,487.32

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Solution

The fourth proportional to 207,980.64, 287,013.30 and 112,487.32 is: 155,232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,980.64 : 287,013.30 = 112,487.32 : x
  2. Step 2: Convert to fraction form
    207,980.64/287,013.30 = 112,487.32/x
  3. Step 3: Cross multiply
    207,980.64x = 287,013.30 × 112,487.32
  4. Step 4: Simplify right side
    207,980.64x = 32,285,356,921.36
  5. Step 5: Solve for x
    x = 32,285,356,921.36/207,980.64
  6. Step 6: Final answer
    x = 155,232.51

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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.