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Finding the Fourth Proportional to 55,368.90, 82,980.45 and 39,768.30

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Solution

The fourth proportional to 55,368.90, 82,980.45 and 39,768.30 is: 59,600.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,368.90 : 82,980.45 = 39,768.30 : x
  2. Step 2: Convert to fraction form
    55,368.90/82,980.45 = 39,768.30/x
  3. Step 3: Cross multiply
    55,368.90x = 82,980.45 × 39,768.30
  4. Step 4: Simplify right side
    55,368.90x = 3,299,991,429.74
  5. Step 5: Solve for x
    x = 3,299,991,429.74/55,368.90
  6. Step 6: Final answer
    x = 59,600.09

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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.