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Finding the Fourth Proportional to 61,153.50, 91,744.68 and 19,031.60

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Solution

The fourth proportional to 61,153.50, 91,744.68 and 19,031.60 is: 28,551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,153.50 : 91,744.68 = 19,031.60 : x
  2. Step 2: Convert to fraction form
    61,153.50/91,744.68 = 19,031.60/x
  3. Step 3: Cross multiply
    61,153.50x = 91,744.68 × 19,031.60
  4. Step 4: Simplify right side
    61,153.50x = 1,746,048,051.89
  5. Step 5: Solve for x
    x = 1,746,048,051.89/61,153.50
  6. Step 6: Final answer
    x = 28,551.89

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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.