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Finding the Fourth Proportional to 72,030.20, 107,907.60 and 38,739.20

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Solution

The fourth proportional to 72,030.20, 107,907.60 and 38,739.20 is: 58,034.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,030.20 : 107,907.60 = 38,739.20 : x
  2. Step 2: Convert to fraction form
    72,030.20/107,907.60 = 38,739.20/x
  3. Step 3: Cross multiply
    72,030.20x = 107,907.60 × 38,739.20
  4. Step 4: Simplify right side
    72,030.20x = 4,180,254,097.92
  5. Step 5: Solve for x
    x = 4,180,254,097.92/72,030.20
  6. Step 6: Final answer
    x = 58,034.74

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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.