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Finding the Fourth Proportional to 371,087.80, 556,631.70 and 134,438.20

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Solution

The fourth proportional to 371,087.80, 556,631.70 and 134,438.20 is: 201,657.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,087.80 : 556,631.70 = 134,438.20 : x
  2. Step 2: Convert to fraction form
    371,087.80/556,631.70 = 134,438.20/x
  3. Step 3: Cross multiply
    371,087.80x = 556,631.70 × 134,438.20
  4. Step 4: Simplify right side
    371,087.80x = 74,832,563,810.94
  5. Step 5: Solve for x
    x = 74,832,563,810.94/371,087.80
  6. Step 6: Final answer
    x = 201,657.30

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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.