Home / 78,747.36-108,668.97-42,938.07

Finding the Fourth Proportional to 78,747.36, 108,668.97 and 42,938.07

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Solution

The fourth proportional to 78,747.36, 108,668.97 and 42,938.07 is: 59,253.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,747.36 : 108,668.97 = 42,938.07 : x
  2. Step 2: Convert to fraction form
    78,747.36/108,668.97 = 42,938.07/x
  3. Step 3: Cross multiply
    78,747.36x = 108,668.97 × 42,938.07
  4. Step 4: Simplify right side
    78,747.36x = 4,666,035,840.69
  5. Step 5: Solve for x
    x = 4,666,035,840.69/78,747.36
  6. Step 6: Final answer
    x = 59,253.24

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1.5x scale

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.