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Finding the Fourth Proportional to 60,981.48, 84,156 and 34,128.60

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Solution

The fourth proportional to 60,981.48, 84,156 and 34,128.60 is: 47,098.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,981.48 : 84,156 = 34,128.60 : x
  2. Step 2: Convert to fraction form
    60,981.48/84,156 = 34,128.60/x
  3. Step 3: Cross multiply
    60,981.48x = 84,156 × 34,128.60
  4. Step 4: Simplify right side
    60,981.48x = 2,872,126,461.60
  5. Step 5: Solve for x
    x = 2,872,126,461.60/60,981.48
  6. Step 6: Final answer
    x = 47,098.34

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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.