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Finding the Fourth Proportional to 125,762.40, 188,643.60 and 66,713.40

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Solution

The fourth proportional to 125,762.40, 188,643.60 and 66,713.40 is: 100,070.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,762.40 : 188,643.60 = 66,713.40 : x
  2. Step 2: Convert to fraction form
    125,762.40/188,643.60 = 66,713.40/x
  3. Step 3: Cross multiply
    125,762.40x = 188,643.60 × 66,713.40
  4. Step 4: Simplify right side
    125,762.40x = 12,585,055,944.24
  5. Step 5: Solve for x
    x = 12,585,055,944.24/125,762.40
  6. Step 6: Final answer
    x = 100,070.10

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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.