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Finding the Fourth Proportional to 70,641.98, 97,486.21 and 40,427.81

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Solution

The fourth proportional to 70,641.98, 97,486.21 and 40,427.81 is: 55,790.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,641.98 : 97,486.21 = 40,427.81 : x
  2. Step 2: Convert to fraction form
    70,641.98/97,486.21 = 40,427.81/x
  3. Step 3: Cross multiply
    70,641.98x = 97,486.21 × 40,427.81
  4. Step 4: Simplify right side
    70,641.98x = 3,941,153,482.02
  5. Step 5: Solve for x
    x = 3,941,153,482.02/70,641.98
  6. Step 6: Final answer
    x = 55,790.53

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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.