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Finding the Fourth Proportional to 153,392.96, 211,650.56 and 89,718.40

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Solution

The fourth proportional to 153,392.96, 211,650.56 and 89,718.40 is: 123,792.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,392.96 : 211,650.56 = 89,718.40 : x
  2. Step 2: Convert to fraction form
    153,392.96/211,650.56 = 89,718.40/x
  3. Step 3: Cross multiply
    153,392.96x = 211,650.56 × 89,718.40
  4. Step 4: Simplify right side
    153,392.96x = 18,988,949,602.30
  5. Step 5: Solve for x
    x = 18,988,949,602.30/153,392.96
  6. Step 6: Final answer
    x = 123,792.84

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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.