Finding the Fourth Proportional to 81,673,413.60, 122,510,120.40 and 36,239,800.80
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Solution
The fourth proportional to 81,673,413.60, 122,510,120.40 and 36,239,800.80 is: 54,359,701.20
Step by Step Solution
- Step 1: Write the proportion equation
81,673,413.60 : 122,510,120.40 = 36,239,800.80 : x - Step 2: Convert to fraction form
81,673,413.60/122,510,120.40 = 36,239,800.80/x - Step 3: Cross multiply
81,673,413.60x = 122,510,120.40 × 36,239,800.80 - Step 4: Simplify right side
81,673,413.60x = 4,439,742,359,280,016 - Step 5: Solve for x
x = 4,439,742,359,280,016/81,673,413.60 - Step 6: Final answer
x = 54,359,701.20
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Double scale
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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.