Home / 115,920.16-159,971.85-64,932.45

Finding the Fourth Proportional to 115,920.16, 159,971.85 and 64,932.45

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Solution

The fourth proportional to 115,920.16, 159,971.85 and 64,932.45 is: 89,607.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.16 : 159,971.85 = 64,932.45 : x
  2. Step 2: Convert to fraction form
    115,920.16/159,971.85 = 64,932.45/x
  3. Step 3: Cross multiply
    115,920.16x = 159,971.85 × 64,932.45
  4. Step 4: Simplify right side
    115,920.16x = 10,387,364,151.53
  5. Step 5: Solve for x
    x = 10,387,364,151.53/115,920.16
  6. Step 6: Final answer
    x = 89,607.92

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1.5x scale

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.