Finding the Fourth Proportional to 128,915,386.20, 193,373,079.30 and 99,690,067.80
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Solution
The fourth proportional to 128,915,386.20, 193,373,079.30 and 99,690,067.80 is: 149,535,101.70
Step by Step Solution
- Step 1: Write the proportion equation
128,915,386.20 : 193,373,079.30 = 99,690,067.80 : x - Step 2: Convert to fraction form
128,915,386.20/193,373,079.30 = 99,690,067.80/x - Step 3: Cross multiply
128,915,386.20x = 193,373,079.30 × 99,690,067.80 - Step 4: Simplify right side
128,915,386.20x = 19,277,375,386,111,776 - Step 5: Solve for x
x = 19,277,375,386,111,776/128,915,386.20 - Step 6: Final answer
x = 149,535,101.70
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.