Home / 78,938.47-108,936.65-43,130.70

Finding the Fourth Proportional to 78,938.47, 108,936.65 and 43,130.70

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Solution

The fourth proportional to 78,938.47, 108,936.65 and 43,130.70 is: 59,521.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.47 : 108,936.65 = 43,130.70 : x
  2. Step 2: Convert to fraction form
    78,938.47/108,936.65 = 43,130.70/x
  3. Step 3: Cross multiply
    78,938.47x = 108,936.65 × 43,130.70
  4. Step 4: Simplify right side
    78,938.47x = 4,698,514,077.98
  5. Step 5: Solve for x
    x = 4,698,514,077.98/78,938.47
  6. Step 6: Final answer
    x = 59,521.22

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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.