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Finding the Fourth Proportional to 61,137.20, 91,705.80 and 21,698.30

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Solution

The fourth proportional to 61,137.20, 91,705.80 and 21,698.30 is: 32,547.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,137.20 : 91,705.80 = 21,698.30 : x
  2. Step 2: Convert to fraction form
    61,137.20/91,705.80 = 21,698.30/x
  3. Step 3: Cross multiply
    61,137.20x = 91,705.80 × 21,698.30
  4. Step 4: Simplify right side
    61,137.20x = 1,989,859,960.14
  5. Step 5: Solve for x
    x = 1,989,859,960.14/61,137.20
  6. Step 6: Final answer
    x = 32,547.45

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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.