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Finding the Fourth Proportional to 84,830.60, 127,075.80 and 53,143.40

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Solution

The fourth proportional to 84,830.60, 127,075.80 and 53,143.40 is: 79,608.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,830.60 : 127,075.80 = 53,143.40 : x
  2. Step 2: Convert to fraction form
    84,830.60/127,075.80 = 53,143.40/x
  3. Step 3: Cross multiply
    84,830.60x = 127,075.80 × 53,143.40
  4. Step 4: Simplify right side
    84,830.60x = 6,753,240,069.72
  5. Step 5: Solve for x
    x = 6,753,240,069.72/84,830.60
  6. Step 6: Final answer
    x = 79,608.54

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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.