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Finding the Fourth Proportional to 103,642.70, 155,464.05 and 97,810.70

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Solution

The fourth proportional to 103,642.70, 155,464.05 and 97,810.70 is: 146,716.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,642.70 : 155,464.05 = 97,810.70 : x
  2. Step 2: Convert to fraction form
    103,642.70/155,464.05 = 97,810.70/x
  3. Step 3: Cross multiply
    103,642.70x = 155,464.05 × 97,810.70
  4. Step 4: Simplify right side
    103,642.70x = 15,206,047,555.34
  5. Step 5: Solve for x
    x = 15,206,047,555.34/103,642.70
  6. Step 6: Final answer
    x = 146,716.05

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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.