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Finding the Fourth Proportional to 66,465.40, 99,698.10 and 19,718.20

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Solution

The fourth proportional to 66,465.40, 99,698.10 and 19,718.20 is: 29,577.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.40 : 99,698.10 = 19,718.20 : x
  2. Step 2: Convert to fraction form
    66,465.40/99,698.10 = 19,718.20/x
  3. Step 3: Cross multiply
    66,465.40x = 99,698.10 × 19,718.20
  4. Step 4: Simplify right side
    66,465.40x = 1,965,867,075.42
  5. Step 5: Solve for x
    x = 1,965,867,075.42/66,465.40
  6. Step 6: Final answer
    x = 29,577.30

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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.