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Finding the Fourth Proportional to 52,260, 72,120.12 and 28,386.68

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Solution

The fourth proportional to 52,260, 72,120.12 and 28,386.68 is: 39,174.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,260 : 72,120.12 = 28,386.68 : x
  2. Step 2: Convert to fraction form
    52,260/72,120.12 = 28,386.68/x
  3. Step 3: Cross multiply
    52,260x = 72,120.12 × 28,386.68
  4. Step 4: Simplify right side
    52,260x = 2,047,250,407.40
  5. Step 5: Solve for x
    x = 2,047,250,407.40/52,260
  6. Step 6: Final answer
    x = 39,174.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.