Home / 218,912.10-328,368.15-61,140.30

Finding the Fourth Proportional to 218,912.10, 328,368.15 and 61,140.30

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Solution

The fourth proportional to 218,912.10, 328,368.15 and 61,140.30 is: 91,710.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,912.10 : 328,368.15 = 61,140.30 : x
  2. Step 2: Convert to fraction form
    218,912.10/328,368.15 = 61,140.30/x
  3. Step 3: Cross multiply
    218,912.10x = 328,368.15 × 61,140.30
  4. Step 4: Simplify right side
    218,912.10x = 20,076,527,201.45
  5. Step 5: Solve for x
    x = 20,076,527,201.45/218,912.10
  6. Step 6: Final answer
    x = 91,710.45

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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.