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Finding the Fourth Proportional to 100,360.10, 138,497.14 and 55,038.40

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Solution

The fourth proportional to 100,360.10, 138,497.14 and 55,038.40 is: 75,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,360.10 : 138,497.14 = 55,038.40 : x
  2. Step 2: Convert to fraction form
    100,360.10/138,497.14 = 55,038.40/x
  3. Step 3: Cross multiply
    100,360.10x = 138,497.14 × 55,038.40
  4. Step 4: Simplify right side
    100,360.10x = 7,622,661,182.19
  5. Step 5: Solve for x
    x = 7,622,661,182.19/100,360.10
  6. Step 6: Final answer
    x = 75,953.10

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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.