Home / 72,681.40-109,035.06-20,089.72

Finding the Fourth Proportional to 72,681.40, 109,035.06 and 20,089.72

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Solution

The fourth proportional to 72,681.40, 109,035.06 and 20,089.72 is: 30,138.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,681.40 : 109,035.06 = 20,089.72 : x
  2. Step 2: Convert to fraction form
    72,681.40/109,035.06 = 20,089.72/x
  3. Step 3: Cross multiply
    72,681.40x = 109,035.06 × 20,089.72
  4. Step 4: Simplify right side
    72,681.40x = 2,190,483,825.58
  5. Step 5: Solve for x
    x = 2,190,483,825.58/72,681.40
  6. Step 6: Final answer
    x = 30,138.16

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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.