Home / 103,388.85-142,677.99-99,812.70

Finding the Fourth Proportional to 103,388.85, 142,677.99 and 99,812.70

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Solution

The fourth proportional to 103,388.85, 142,677.99 and 99,812.70 is: 137,742.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,388.85 : 142,677.99 = 99,812.70 : x
  2. Step 2: Convert to fraction form
    103,388.85/142,677.99 = 99,812.70/x
  3. Step 3: Cross multiply
    103,388.85x = 142,677.99 × 99,812.70
  4. Step 4: Simplify right side
    103,388.85x = 14,241,075,412.47
  5. Step 5: Solve for x
    x = 14,241,075,412.47/103,388.85
  6. Step 6: Final answer
    x = 137,742.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.