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Finding the Fourth Proportional to 70,386.74, 97,133.73 and 38,556.78

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Solution

The fourth proportional to 70,386.74, 97,133.73 and 38,556.78 is: 53,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,386.74 : 97,133.73 = 38,556.78 : x
  2. Step 2: Convert to fraction form
    70,386.74/97,133.73 = 38,556.78/x
  3. Step 3: Cross multiply
    70,386.74x = 97,133.73 × 38,556.78
  4. Step 4: Simplify right side
    70,386.74x = 3,745,163,858.19
  5. Step 5: Solve for x
    x = 3,745,163,858.19/70,386.74
  6. Step 6: Final answer
    x = 53,208.37

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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.