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Finding the Fourth Proportional to 97,790.40, 147,074.40 and 87,681.60

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Solution

The fourth proportional to 97,790.40, 147,074.40 and 87,681.60 is: 131,871.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,790.40 : 147,074.40 = 87,681.60 : x
  2. Step 2: Convert to fraction form
    97,790.40/147,074.40 = 87,681.60/x
  3. Step 3: Cross multiply
    97,790.40x = 147,074.40 × 87,681.60
  4. Step 4: Simplify right side
    97,790.40x = 12,895,718,711.04
  5. Step 5: Solve for x
    x = 12,895,718,711.04/97,790.40
  6. Step 6: Final answer
    x = 131,871.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.