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Finding the Fourth Proportional to 124,126.45, 186,041.71 and 86,482.69

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Solution

The fourth proportional to 124,126.45, 186,041.71 and 86,482.69 is: 129,620.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,126.45 : 186,041.71 = 86,482.69 : x
  2. Step 2: Convert to fraction form
    124,126.45/186,041.71 = 86,482.69/x
  3. Step 3: Cross multiply
    124,126.45x = 186,041.71 × 86,482.69
  4. Step 4: Simplify right side
    124,126.45x = 16,089,386,386.58
  5. Step 5: Solve for x
    x = 16,089,386,386.58/124,126.45
  6. Step 6: Final answer
    x = 129,620.94

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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.