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Finding the Fourth Proportional to 70,681.75, 97,427.31 and 64,887.58

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Solution

The fourth proportional to 70,681.75, 97,427.31 and 64,887.58 is: 89,440.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,681.75 : 97,427.31 = 64,887.58 : x
  2. Step 2: Convert to fraction form
    70,681.75/97,427.31 = 64,887.58/x
  3. Step 3: Cross multiply
    70,681.75x = 97,427.31 × 64,887.58
  4. Step 4: Simplify right side
    70,681.75x = 6,321,822,250.27
  5. Step 5: Solve for x
    x = 6,321,822,250.27/70,681.75
  6. Step 6: Final answer
    x = 89,440.66

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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.