Home / 115,708.40-159,661.64-64,718.50

Finding the Fourth Proportional to 115,708.40, 159,661.64 and 64,718.50

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Solution

The fourth proportional to 115,708.40, 159,661.64 and 64,718.50 is: 89,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,708.40 : 159,661.64 = 64,718.50 : x
  2. Step 2: Convert to fraction form
    115,708.40/159,661.64 = 64,718.50/x
  3. Step 3: Cross multiply
    115,708.40x = 159,661.64 × 64,718.50
  4. Step 4: Simplify right side
    115,708.40x = 10,333,061,610.98
  5. Step 5: Solve for x
    x = 10,333,061,610.98/115,708.40
  6. Step 6: Final answer
    x = 89,302.60

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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.