Home / 115,707.90-159,660.95-64,718

Finding the Fourth Proportional to 115,707.90, 159,660.95 and 64,718

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Solution

The fourth proportional to 115,707.90, 159,660.95 and 64,718 is: 89,301.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,707.90 : 159,660.95 = 64,718 : x
  2. Step 2: Convert to fraction form
    115,707.90/159,660.95 = 64,718/x
  3. Step 3: Cross multiply
    115,707.90x = 159,660.95 × 64,718
  4. Step 4: Simplify right side
    115,707.90x = 10,332,937,362.10
  5. Step 5: Solve for x
    x = 10,332,937,362.10/115,707.90
  6. Step 6: Final answer
    x = 89,301.92

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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.