Home / 148,779.20-205,316.16-85,119.68

Finding the Fourth Proportional to 148,779.20, 205,316.16 and 85,119.68

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Solution

The fourth proportional to 148,779.20, 205,316.16 and 85,119.68 is: 117,465.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,779.20 : 205,316.16 = 85,119.68 : x
  2. Step 2: Convert to fraction form
    148,779.20/205,316.16 = 85,119.68/x
  3. Step 3: Cross multiply
    148,779.20x = 205,316.16 × 85,119.68
  4. Step 4: Simplify right side
    148,779.20x = 17,476,445,838.03
  5. Step 5: Solve for x
    x = 17,476,445,838.03/148,779.20
  6. Step 6: Final answer
    x = 117,465.65

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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.