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Finding the Fourth Proportional to 137,958.32, 190,387.51 and 77,530.16

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Solution

The fourth proportional to 137,958.32, 190,387.51 and 77,530.16 is: 106,994.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,958.32 : 190,387.51 = 77,530.16 : x
  2. Step 2: Convert to fraction form
    137,958.32/190,387.51 = 77,530.16/x
  3. Step 3: Cross multiply
    137,958.32x = 190,387.51 × 77,530.16
  4. Step 4: Simplify right side
    137,958.32x = 14,760,774,394.45
  5. Step 5: Solve for x
    x = 14,760,774,394.45/137,958.32
  6. Step 6: Final answer
    x = 106,994.45

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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.