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Finding the Fourth Proportional to 60,368.90, 90,532.84 and 20,916.80

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Solution

The fourth proportional to 60,368.90, 90,532.84 and 20,916.80 is: 31,368.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,368.90 : 90,532.84 = 20,916.80 : x
  2. Step 2: Convert to fraction form
    60,368.90/90,532.84 = 20,916.80/x
  3. Step 3: Cross multiply
    60,368.90x = 90,532.84 × 20,916.80
  4. Step 4: Simplify right side
    60,368.90x = 1,893,657,203.13
  5. Step 5: Solve for x
    x = 1,893,657,203.13/60,368.90
  6. Step 6: Final answer
    x = 31,368.09

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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.