Home / 115,857.51-159,878.93-64,865.47

Finding the Fourth Proportional to 115,857.51, 159,878.93 and 64,865.47

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Solution

The fourth proportional to 115,857.51, 159,878.93 and 64,865.47 is: 89,511.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,857.51 : 159,878.93 = 64,865.47 : x
  2. Step 2: Convert to fraction form
    115,857.51/159,878.93 = 64,865.47/x
  3. Step 3: Cross multiply
    115,857.51x = 159,878.93 × 64,865.47
  4. Step 4: Simplify right side
    115,857.51x = 10,370,621,700.01
  5. Step 5: Solve for x
    x = 10,370,621,700.01/115,857.51
  6. Step 6: Final answer
    x = 89,511.87

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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.