Home / 153,748.53-212,168.16-90,128.70

Finding the Fourth Proportional to 153,748.53, 212,168.16 and 90,128.70

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Solution

The fourth proportional to 153,748.53, 212,168.16 and 90,128.70 is: 124,374.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,748.53 : 212,168.16 = 90,128.70 : x
  2. Step 2: Convert to fraction form
    153,748.53/212,168.16 = 90,128.70/x
  3. Step 3: Cross multiply
    153,748.53x = 212,168.16 × 90,128.70
  4. Step 4: Simplify right side
    153,748.53x = 19,122,440,442.19
  5. Step 5: Solve for x
    x = 19,122,440,442.19/153,748.53
  6. Step 6: Final answer
    x = 124,374.79

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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.