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Finding the Fourth Proportional to 153,671.76, 212,073.48 and 90,000.72

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Solution

The fourth proportional to 153,671.76, 212,073.48 and 90,000.72 is: 124,204.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,671.76 : 212,073.48 = 90,000.72 : x
  2. Step 2: Convert to fraction form
    153,671.76/212,073.48 = 90,000.72/x
  3. Step 3: Cross multiply
    153,671.76x = 212,073.48 × 90,000.72
  4. Step 4: Simplify right side
    153,671.76x = 19,086,765,892.91
  5. Step 5: Solve for x
    x = 19,086,765,892.91/153,671.76
  6. Step 6: Final answer
    x = 124,204.77

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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.