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Finding the Fourth Proportional to 153,785.88, 212,224.72 and 90,123.63

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Solution

The fourth proportional to 153,785.88, 212,224.72 and 90,123.63 is: 124,370.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,785.88 : 212,224.72 = 90,123.63 : x
  2. Step 2: Convert to fraction form
    153,785.88/212,224.72 = 90,123.63/x
  3. Step 3: Cross multiply
    153,785.88x = 212,224.72 × 90,123.63
  4. Step 4: Simplify right side
    153,785.88x = 19,126,462,142.13
  5. Step 5: Solve for x
    x = 19,126,462,142.13/153,785.88
  6. Step 6: Final answer
    x = 124,370.73

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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.