Home / 115,705.29-159,688.10-64,720.86

Finding the Fourth Proportional to 115,705.29, 159,688.10 and 64,720.86

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Solution

The fourth proportional to 115,705.29, 159,688.10 and 64,720.86 is: 89,323.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,705.29 : 159,688.10 = 64,720.86 : x
  2. Step 2: Convert to fraction form
    115,705.29/159,688.10 = 64,720.86/x
  3. Step 3: Cross multiply
    115,705.29x = 159,688.10 × 64,720.86
  4. Step 4: Simplify right side
    115,705.29x = 10,335,151,163.77
  5. Step 5: Solve for x
    x = 10,335,151,163.77/115,705.29
  6. Step 6: Final answer
    x = 89,323.07

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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.