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Finding the Fourth Proportional to 145,700.19, 218,397.20 and 66,749.49

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Solution

The fourth proportional to 145,700.19, 218,397.20 and 66,749.49 is: 100,054.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,700.19 : 218,397.20 = 66,749.49 : x
  2. Step 2: Convert to fraction form
    145,700.19/218,397.20 = 66,749.49/x
  3. Step 3: Cross multiply
    145,700.19x = 218,397.20 × 66,749.49
  4. Step 4: Simplify right side
    145,700.19x = 14,577,901,383.68
  5. Step 5: Solve for x
    x = 14,577,901,383.68/145,700.19
  6. Step 6: Final answer
    x = 100,054.10

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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.