Home / 142,189.20-196,232.70-81,779.40

Finding the Fourth Proportional to 142,189.20, 196,232.70 and 81,779.40

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Solution

The fourth proportional to 142,189.20, 196,232.70 and 81,779.40 is: 112,862.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,189.20 : 196,232.70 = 81,779.40 : x
  2. Step 2: Convert to fraction form
    142,189.20/196,232.70 = 81,779.40/x
  3. Step 3: Cross multiply
    142,189.20x = 196,232.70 × 81,779.40
  4. Step 4: Simplify right side
    142,189.20x = 16,047,792,466.38
  5. Step 5: Solve for x
    x = 16,047,792,466.38/142,189.20
  6. Step 6: Final answer
    x = 112,862.25

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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.