Home / 100,030.07-138,039.56-54,707.91

Finding the Fourth Proportional to 100,030.07, 138,039.56 and 54,707.91

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Solution

The fourth proportional to 100,030.07, 138,039.56 and 54,707.91 is: 75,495.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,030.07 : 138,039.56 = 54,707.91 : x
  2. Step 2: Convert to fraction form
    100,030.07/138,039.56 = 54,707.91/x
  3. Step 3: Cross multiply
    100,030.07x = 138,039.56 × 54,707.91
  4. Step 4: Simplify right side
    100,030.07x = 7,551,855,756.53
  5. Step 5: Solve for x
    x = 7,551,855,756.53/100,030.07
  6. Step 6: Final answer
    x = 75,495.85

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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.