Home / 660,139,741.60-990,209,612.40-200,018,123.80

Finding the Fourth Proportional to 660,139,741.60, 990,209,612.40 and 200,018,123.80

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Solution

The fourth proportional to 660,139,741.60, 990,209,612.40 and 200,018,123.80 is: 300,027,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,139,741.60 : 990,209,612.40 = 200,018,123.80 : x
  2. Step 2: Convert to fraction form
    660,139,741.60/990,209,612.40 = 200,018,123.80/x
  3. Step 3: Cross multiply
    660,139,741.60x = 990,209,612.40 × 200,018,123.80
  4. Step 4: Simplify right side
    660,139,741.60x = 198,059,868,840,973,216
  5. Step 5: Solve for x
    x = 198,059,868,840,973,216/660,139,741.60
  6. Step 6: Final answer
    x = 300,027,185.70

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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.