Home / 115,332.95-159,133.65-86,721.53

Finding the Fourth Proportional to 115,332.95, 159,133.65 and 86,721.53

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Solution

The fourth proportional to 115,332.95, 159,133.65 and 86,721.53 is: 119,656.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,332.95 : 159,133.65 = 86,721.53 : x
  2. Step 2: Convert to fraction form
    115,332.95/159,133.65 = 86,721.53/x
  3. Step 3: Cross multiply
    115,332.95x = 159,133.65 × 86,721.53
  4. Step 4: Simplify right side
    115,332.95x = 13,800,312,806.82
  5. Step 5: Solve for x
    x = 13,800,312,806.82/115,332.95
  6. Step 6: Final answer
    x = 119,656.29

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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.