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Finding the Fourth Proportional to 70,496, 97,293.12 and 40,688

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Solution

The fourth proportional to 70,496, 97,293.12 and 40,688 is: 56,154.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,496 : 97,293.12 = 40,688 : x
  2. Step 2: Convert to fraction form
    70,496/97,293.12 = 40,688/x
  3. Step 3: Cross multiply
    70,496x = 97,293.12 × 40,688
  4. Step 4: Simplify right side
    70,496x = 3,958,662,466.56
  5. Step 5: Solve for x
    x = 3,958,662,466.56/70,496
  6. Step 6: Final answer
    x = 56,154.43

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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.