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Finding the Fourth Proportional to 100,030.54, 138,054.70 and 65,604.19

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Solution

The fourth proportional to 100,030.54, 138,054.70 and 65,604.19 is: 90,542.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,030.54 : 138,054.70 = 65,604.19 : x
  2. Step 2: Convert to fraction form
    100,030.54/138,054.70 = 65,604.19/x
  3. Step 3: Cross multiply
    100,030.54x = 138,054.70 × 65,604.19
  4. Step 4: Simplify right side
    100,030.54x = 9,056,966,769.19
  5. Step 5: Solve for x
    x = 9,056,966,769.19/100,030.54
  6. Step 6: Final answer
    x = 90,542.02

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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.