Home / 78,938.26-108,931.56-43,129.50

Finding the Fourth Proportional to 78,938.26, 108,931.56 and 43,129.50

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Solution

The fourth proportional to 78,938.26, 108,931.56 and 43,129.50 is: 59,516.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.26 : 108,931.56 = 43,129.50 : x
  2. Step 2: Convert to fraction form
    78,938.26/108,931.56 = 43,129.50/x
  3. Step 3: Cross multiply
    78,938.26x = 108,931.56 × 43,129.50
  4. Step 4: Simplify right side
    78,938.26x = 4,698,163,717.02
  5. Step 5: Solve for x
    x = 4,698,163,717.02/78,938.26
  6. Step 6: Final answer
    x = 59,516.94

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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.