Home / 130,743.84-180,464.58-85,428.72

Finding the Fourth Proportional to 130,743.84, 180,464.58 and 85,428.72

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Solution

The fourth proportional to 130,743.84, 180,464.58 and 85,428.72 is: 117,916.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,743.84 : 180,464.58 = 85,428.72 : x
  2. Step 2: Convert to fraction form
    130,743.84/180,464.58 = 85,428.72/x
  3. Step 3: Cross multiply
    130,743.84x = 180,464.58 × 85,428.72
  4. Step 4: Simplify right side
    130,743.84x = 15,416,858,074.74
  5. Step 5: Solve for x
    x = 15,416,858,074.74/130,743.84
  6. Step 6: Final answer
    x = 117,916.52

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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.