Home / 140,420.64-193,881.96-86,779.20

Finding the Fourth Proportional to 140,420.64, 193,881.96 and 86,779.20

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Solution

The fourth proportional to 140,420.64, 193,881.96 and 86,779.20 is: 119,818.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,420.64 : 193,881.96 = 86,779.20 : x
  2. Step 2: Convert to fraction form
    140,420.64/193,881.96 = 86,779.20/x
  3. Step 3: Cross multiply
    140,420.64x = 193,881.96 × 86,779.20
  4. Step 4: Simplify right side
    140,420.64x = 16,824,921,383.23
  5. Step 5: Solve for x
    x = 16,824,921,383.23/140,420.64
  6. Step 6: Final answer
    x = 119,818.01

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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.