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Finding the Fourth Proportional to 210,065.47, 315,015.99 and 91,656.43

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Solution

The fourth proportional to 210,065.47, 315,015.99 and 91,656.43 is: 137,448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,065.47 : 315,015.99 = 91,656.43 : x
  2. Step 2: Convert to fraction form
    210,065.47/315,015.99 = 91,656.43/x
  3. Step 3: Cross multiply
    210,065.47x = 315,015.99 × 91,656.43
  4. Step 4: Simplify right side
    210,065.47x = 28,873,241,036.32
  5. Step 5: Solve for x
    x = 28,873,241,036.32/210,065.47
  6. Step 6: Final answer
    x = 137,448.77

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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.