Home / 153,710.18-212,120.43-85,731.56

Finding the Fourth Proportional to 153,710.18, 212,120.43 and 85,731.56

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Solution

The fourth proportional to 153,710.18, 212,120.43 and 85,731.56 is: 118,309.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,710.18 : 212,120.43 = 85,731.56 : x
  2. Step 2: Convert to fraction form
    153,710.18/212,120.43 = 85,731.56/x
  3. Step 3: Cross multiply
    153,710.18x = 212,120.43 × 85,731.56
  4. Step 4: Simplify right side
    153,710.18x = 18,185,413,882.51
  5. Step 5: Solve for x
    x = 18,185,413,882.51/153,710.18
  6. Step 6: Final answer
    x = 118,309.76

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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.