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Finding the Fourth Proportional to 61,437.72, 92,168.88 and 19,328.40

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Solution

The fourth proportional to 61,437.72, 92,168.88 and 19,328.40 is: 28,996.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,437.72 : 92,168.88 = 19,328.40 : x
  2. Step 2: Convert to fraction form
    61,437.72/92,168.88 = 19,328.40/x
  3. Step 3: Cross multiply
    61,437.72x = 92,168.88 × 19,328.40
  4. Step 4: Simplify right side
    61,437.72x = 1,781,476,980.19
  5. Step 5: Solve for x
    x = 1,781,476,980.19/61,437.72
  6. Step 6: Final answer
    x = 28,996.47

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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.