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Finding the Fourth Proportional to 115,199.18, 158,955.63 and 64,200.78

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Solution

The fourth proportional to 115,199.18, 158,955.63 and 64,200.78 is: 88,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,199.18 : 158,955.63 = 64,200.78 : x
  2. Step 2: Convert to fraction form
    115,199.18/158,955.63 = 64,200.78/x
  3. Step 3: Cross multiply
    115,199.18x = 158,955.63 × 64,200.78
  4. Step 4: Simplify right side
    115,199.18x = 10,205,075,431.39
  5. Step 5: Solve for x
    x = 10,205,075,431.39/115,199.18
  6. Step 6: Final answer
    x = 88,586.35

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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.