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Finding the Fourth Proportional to 158,511.32, 218,768 and 98,101.40

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Solution

The fourth proportional to 158,511.32, 218,768 and 98,101.40 is: 135,393.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,511.32 : 218,768 = 98,101.40 : x
  2. Step 2: Convert to fraction form
    158,511.32/218,768 = 98,101.40/x
  3. Step 3: Cross multiply
    158,511.32x = 218,768 × 98,101.40
  4. Step 4: Simplify right side
    158,511.32x = 21,461,447,075.20
  5. Step 5: Solve for x
    x = 21,461,447,075.20/158,511.32
  6. Step 6: Final answer
    x = 135,393.78

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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.