Home / 78,912.30-118,368.45-49,421.10

Finding the Fourth Proportional to 78,912.30, 118,368.45 and 49,421.10

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Solution

The fourth proportional to 78,912.30, 118,368.45 and 49,421.10 is: 74,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,912.30 : 118,368.45 = 49,421.10 : x
  2. Step 2: Convert to fraction form
    78,912.30/118,368.45 = 49,421.10/x
  3. Step 3: Cross multiply
    78,912.30x = 118,368.45 × 49,421.10
  4. Step 4: Simplify right side
    78,912.30x = 5,849,899,004.30
  5. Step 5: Solve for x
    x = 5,849,899,004.30/78,912.30
  6. Step 6: Final answer
    x = 74,131.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.