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Finding the Fourth Proportional to 123,541.60, 185,312.40 and 76,885.60

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Solution

The fourth proportional to 123,541.60, 185,312.40 and 76,885.60 is: 115,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,541.60 : 185,312.40 = 76,885.60 : x
  2. Step 2: Convert to fraction form
    123,541.60/185,312.40 = 76,885.60/x
  3. Step 3: Cross multiply
    123,541.60x = 185,312.40 × 76,885.60
  4. Step 4: Simplify right side
    123,541.60x = 14,247,855,061.44
  5. Step 5: Solve for x
    x = 14,247,855,061.44/123,541.60
  6. Step 6: Final answer
    x = 115,328.40

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1.5x scale

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.