Home / 153,716.07-212,129.43-85,730.79

Finding the Fourth Proportional to 153,716.07, 212,129.43 and 85,730.79

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Solution

The fourth proportional to 153,716.07, 212,129.43 and 85,730.79 is: 118,309.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,716.07 : 212,129.43 = 85,730.79 : x
  2. Step 2: Convert to fraction form
    153,716.07/212,129.43 = 85,730.79/x
  3. Step 3: Cross multiply
    153,716.07x = 212,129.43 × 85,730.79
  4. Step 4: Simplify right side
    153,716.07x = 18,186,023,616.15
  5. Step 5: Solve for x
    x = 18,186,023,616.15/153,716.07
  6. Step 6: Final answer
    x = 118,309.19

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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.