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Finding the Fourth Proportional to 70,616.61, 97,427.21 and 39,985.53

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Solution

The fourth proportional to 70,616.61, 97,427.21 and 39,985.53 is: 55,166.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,616.61 : 97,427.21 = 39,985.53 : x
  2. Step 2: Convert to fraction form
    70,616.61/97,427.21 = 39,985.53/x
  3. Step 3: Cross multiply
    70,616.61x = 97,427.21 × 39,985.53
  4. Step 4: Simplify right side
    70,616.61x = 3,895,678,428.34
  5. Step 5: Solve for x
    x = 3,895,678,428.34/70,616.61
  6. Step 6: Final answer
    x = 55,166.60

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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.