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Finding the Fourth Proportional to 124,128.40, 186,192.60 and 49,266.40

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Solution

The fourth proportional to 124,128.40, 186,192.60 and 49,266.40 is: 73,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,128.40 : 186,192.60 = 49,266.40 : x
  2. Step 2: Convert to fraction form
    124,128.40/186,192.60 = 49,266.40/x
  3. Step 3: Cross multiply
    124,128.40x = 186,192.60 × 49,266.40
  4. Step 4: Simplify right side
    124,128.40x = 9,173,039,108.64
  5. Step 5: Solve for x
    x = 9,173,039,108.64/124,128.40
  6. Step 6: Final answer
    x = 73,899.60

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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.