Home / 142,038.99-196,015.01-78,381.09

Finding the Fourth Proportional to 142,038.99, 196,015.01 and 78,381.09

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Solution

The fourth proportional to 142,038.99, 196,015.01 and 78,381.09 is: 108,166.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,038.99 : 196,015.01 = 78,381.09 : x
  2. Step 2: Convert to fraction form
    142,038.99/196,015.01 = 78,381.09/x
  3. Step 3: Cross multiply
    142,038.99x = 196,015.01 × 78,381.09
  4. Step 4: Simplify right side
    142,038.99x = 15,363,869,748.26
  5. Step 5: Solve for x
    x = 15,363,869,748.26/142,038.99
  6. Step 6: Final answer
    x = 108,166.57

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1.5x scale

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.