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Finding the Fourth Proportional to 70,703.51, 97,564.57 and 38,871.72

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Solution

The fourth proportional to 70,703.51, 97,564.57 and 38,871.72 is: 53,639.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,703.51 : 97,564.57 = 38,871.72 : x
  2. Step 2: Convert to fraction form
    70,703.51/97,564.57 = 38,871.72/x
  3. Step 3: Cross multiply
    70,703.51x = 97,564.57 × 38,871.72
  4. Step 4: Simplify right side
    70,703.51x = 3,792,502,549.78
  5. Step 5: Solve for x
    x = 3,792,502,549.78/70,703.51
  6. Step 6: Final answer
    x = 53,639.53

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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.