Home / 81,079,038.28-121,618,557.30-20,494,764.28

Finding the Fourth Proportional to 81,079,038.28, 121,618,557.30 and 20,494,764.28

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Solution

The fourth proportional to 81,079,038.28, 121,618,557.30 and 20,494,764.28 is: 30,742,146.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079,038.28 : 121,618,557.30 = 20,494,764.28 : x
  2. Step 2: Convert to fraction form
    81,079,038.28/121,618,557.30 = 20,494,764.28/x
  3. Step 3: Cross multiply
    81,079,038.28x = 121,618,557.30 × 20,494,764.28
  4. Step 4: Simplify right side
    81,079,038.28x = 2,492,543,663,937,173.50
  5. Step 5: Solve for x
    x = 2,492,543,663,937,173.50/81,079,038.28
  6. Step 6: Final answer
    x = 30,742,146.39

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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.