Home / 142,218.34-196,257.55-78,554.77

Finding the Fourth Proportional to 142,218.34, 196,257.55 and 78,554.77

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Solution

The fourth proportional to 142,218.34, 196,257.55 and 78,554.77 is: 108,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,218.34 : 196,257.55 = 78,554.77 : x
  2. Step 2: Convert to fraction form
    142,218.34/196,257.55 = 78,554.77/x
  3. Step 3: Cross multiply
    142,218.34x = 196,257.55 × 78,554.77
  4. Step 4: Simplify right side
    142,218.34x = 15,416,966,701.01
  5. Step 5: Solve for x
    x = 15,416,966,701.01/142,218.34
  6. Step 6: Final answer
    x = 108,403.51

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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.