Home / 208,215.40-312,323.10-89,804.20

Finding the Fourth Proportional to 208,215.40, 312,323.10 and 89,804.20

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Solution

The fourth proportional to 208,215.40, 312,323.10 and 89,804.20 is: 134,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,215.40 : 312,323.10 = 89,804.20 : x
  2. Step 2: Convert to fraction form
    208,215.40/312,323.10 = 89,804.20/x
  3. Step 3: Cross multiply
    208,215.40x = 312,323.10 × 89,804.20
  4. Step 4: Simplify right side
    208,215.40x = 28,047,926,137.02
  5. Step 5: Solve for x
    x = 28,047,926,137.02/208,215.40
  6. Step 6: Final answer
    x = 134,706.30

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1.5x scale

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.