Home / 142,650.95-196,858.31-78,988.77

Finding the Fourth Proportional to 142,650.95, 196,858.31 and 78,988.77

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Solution

The fourth proportional to 142,650.95, 196,858.31 and 78,988.77 is: 109,004.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,650.95 : 196,858.31 = 78,988.77 : x
  2. Step 2: Convert to fraction form
    142,650.95/196,858.31 = 78,988.77/x
  3. Step 3: Cross multiply
    142,650.95x = 196,858.31 × 78,988.77
  4. Step 4: Simplify right side
    142,650.95x = 15,549,595,376.23
  5. Step 5: Solve for x
    x = 15,549,595,376.23/142,650.95
  6. Step 6: Final answer
    x = 109,004.50

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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.