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Finding the Fourth Proportional to 61,137.40, 91,702.32 and 21,689.32

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Solution

The fourth proportional to 61,137.40, 91,702.32 and 21,689.32 is: 32,532.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,137.40 : 91,702.32 = 21,689.32 : x
  2. Step 2: Convert to fraction form
    61,137.40/91,702.32 = 21,689.32/x
  3. Step 3: Cross multiply
    61,137.40x = 91,702.32 × 21,689.32
  4. Step 4: Simplify right side
    61,137.40x = 1,988,960,963.22
  5. Step 5: Solve for x
    x = 1,988,960,963.22/61,137.40
  6. Step 6: Final answer
    x = 32,532.64

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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.