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Finding the Fourth Proportional to 70,648.68, 97,495.47 and 38,818.20

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Solution

The fourth proportional to 70,648.68, 97,495.47 and 38,818.20 is: 53,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,648.68 : 97,495.47 = 38,818.20 : x
  2. Step 2: Convert to fraction form
    70,648.68/97,495.47 = 38,818.20/x
  3. Step 3: Cross multiply
    70,648.68x = 97,495.47 × 38,818.20
  4. Step 4: Simplify right side
    70,648.68x = 3,784,598,653.55
  5. Step 5: Solve for x
    x = 3,784,598,653.55/70,648.68
  6. Step 6: Final answer
    x = 53,569.28

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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.