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Finding the Fourth Proportional to 89,076.90, 133,615.35 and 42,420.90

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Solution

The fourth proportional to 89,076.90, 133,615.35 and 42,420.90 is: 63,631.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,076.90 : 133,615.35 = 42,420.90 : x
  2. Step 2: Convert to fraction form
    89,076.90/133,615.35 = 42,420.90/x
  3. Step 3: Cross multiply
    89,076.90x = 133,615.35 × 42,420.90
  4. Step 4: Simplify right side
    89,076.90x = 5,668,083,400.82
  5. Step 5: Solve for x
    x = 5,668,083,400.82/89,076.90
  6. Step 6: Final answer
    x = 63,631.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.