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Finding the Fourth Proportional to 70,368.98, 105,560.39 and 20,449.51

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Solution

The fourth proportional to 70,368.98, 105,560.39 and 20,449.51 is: 30,676.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,368.98 : 105,560.39 = 20,449.51 : x
  2. Step 2: Convert to fraction form
    70,368.98/105,560.39 = 20,449.51/x
  3. Step 3: Cross multiply
    70,368.98x = 105,560.39 × 20,449.51
  4. Step 4: Simplify right side
    70,368.98x = 2,158,658,038.13
  5. Step 5: Solve for x
    x = 2,158,658,038.13/70,368.98
  6. Step 6: Final answer
    x = 30,676.28

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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.