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Finding the Fourth Proportional to 145,713.60, 218,570.40 and 143,380.80

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Solution

The fourth proportional to 145,713.60, 218,570.40 and 143,380.80 is: 215,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,713.60 : 218,570.40 = 143,380.80 : x
  2. Step 2: Convert to fraction form
    145,713.60/218,570.40 = 143,380.80/x
  3. Step 3: Cross multiply
    145,713.60x = 218,570.40 × 143,380.80
  4. Step 4: Simplify right side
    145,713.60x = 31,338,798,808.32
  5. Step 5: Solve for x
    x = 31,338,798,808.32/145,713.60
  6. Step 6: Final answer
    x = 215,071.20

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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.