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Finding the Fourth Proportional to 100,030.36, 138,036.80 and 54,699.56

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Solution

The fourth proportional to 100,030.36, 138,036.80 and 54,699.56 is: 75,482.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,030.36 : 138,036.80 = 54,699.56 : x
  2. Step 2: Convert to fraction form
    100,030.36/138,036.80 = 54,699.56/x
  3. Step 3: Cross multiply
    100,030.36x = 138,036.80 × 54,699.56
  4. Step 4: Simplify right side
    100,030.36x = 7,550,552,223.81
  5. Step 5: Solve for x
    x = 7,550,552,223.81/100,030.36
  6. Step 6: Final answer
    x = 75,482.61

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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.