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Finding the Fourth Proportional to 84,043.72, 115,978.84 and 45,803.60

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Solution

The fourth proportional to 84,043.72, 115,978.84 and 45,803.60 is: 63,208.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,043.72 : 115,978.84 = 45,803.60 : x
  2. Step 2: Convert to fraction form
    84,043.72/115,978.84 = 45,803.60/x
  3. Step 3: Cross multiply
    84,043.72x = 115,978.84 × 45,803.60
  4. Step 4: Simplify right side
    84,043.72x = 5,312,248,395.82
  5. Step 5: Solve for x
    x = 5,312,248,395.82/84,043.72
  6. Step 6: Final answer
    x = 63,208.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.