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Finding the Fourth Proportional to 103,589.70, 155,509.02 and 70,208.49

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Solution

The fourth proportional to 103,589.70, 155,509.02 and 70,208.49 is: 105,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,589.70 : 155,509.02 = 70,208.49 : x
  2. Step 2: Convert to fraction form
    103,589.70/155,509.02 = 70,208.49/x
  3. Step 3: Cross multiply
    103,589.70x = 155,509.02 × 70,208.49
  4. Step 4: Simplify right side
    103,589.70x = 10,918,053,475.58
  5. Step 5: Solve for x
    x = 10,918,053,475.58/103,589.70
  6. Step 6: Final answer
    x = 105,397.10

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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.