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Finding the Fourth Proportional to 61,188.40, 84,435.78 and 34,328.80

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Solution

The fourth proportional to 61,188.40, 84,435.78 and 34,328.80 is: 47,371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,188.40 : 84,435.78 = 34,328.80 : x
  2. Step 2: Convert to fraction form
    61,188.40/84,435.78 = 34,328.80/x
  3. Step 3: Cross multiply
    61,188.40x = 84,435.78 × 34,328.80
  4. Step 4: Simplify right side
    61,188.40x = 2,898,579,004.46
  5. Step 5: Solve for x
    x = 2,898,579,004.46/61,188.40
  6. Step 6: Final answer
    x = 47,371.38

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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.