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Finding the Fourth Proportional to 137,880.52, 190,366.32 and 90,218.32

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Solution

The fourth proportional to 137,880.52, 190,366.32 and 90,218.32 is: 124,560.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,880.52 : 190,366.32 = 90,218.32 : x
  2. Step 2: Convert to fraction form
    137,880.52/190,366.32 = 90,218.32/x
  3. Step 3: Cross multiply
    137,880.52x = 190,366.32 × 90,218.32
  4. Step 4: Simplify right side
    137,880.52x = 17,174,529,574.98
  5. Step 5: Solve for x
    x = 17,174,529,574.98/137,880.52
  6. Step 6: Final answer
    x = 124,560.96

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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.