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Finding the Fourth Proportional to 72,679.40, 109,044.70 and 70,119.40

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Solution

The fourth proportional to 72,679.40, 109,044.70 and 70,119.40 is: 105,203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,679.40 : 109,044.70 = 70,119.40 : x
  2. Step 2: Convert to fraction form
    72,679.40/109,044.70 = 70,119.40/x
  3. Step 3: Cross multiply
    72,679.40x = 109,044.70 × 70,119.40
  4. Step 4: Simplify right side
    72,679.40x = 7,646,148,937.18
  5. Step 5: Solve for x
    x = 7,646,148,937.18/72,679.40
  6. Step 6: Final answer
    x = 105,203.80

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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.