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Finding the Fourth Proportional to 84,760.40, 127,140.60 and 83,205.20

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Solution

The fourth proportional to 84,760.40, 127,140.60 and 83,205.20 is: 124,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,760.40 : 127,140.60 = 83,205.20 : x
  2. Step 2: Convert to fraction form
    84,760.40/127,140.60 = 83,205.20/x
  3. Step 3: Cross multiply
    84,760.40x = 127,140.60 × 83,205.20
  4. Step 4: Simplify right side
    84,760.40x = 10,578,759,051.12
  5. Step 5: Solve for x
    x = 10,578,759,051.12/84,760.40
  6. Step 6: Final answer
    x = 124,807.80

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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.