Finding the Fourth Proportional to 128,565,772.56, 177,400,035.90 and 78,990,202.08
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Solution
The fourth proportional to 128,565,772.56, 177,400,035.90 and 78,990,202.08 is: 108,993,742.31
Step by Step Solution
- Step 1: Write the proportion equation
128,565,772.56 : 177,400,035.90 = 78,990,202.08 : x - Step 2: Convert to fraction form
128,565,772.56/177,400,035.90 = 78,990,202.08/x - Step 3: Cross multiply
128,565,772.56x = 177,400,035.90 × 78,990,202.08 - Step 4: Simplify right side
128,565,772.56x = 14,012,864,684,740,254 - Step 5: Solve for x
x = 14,012,864,684,740,254/128,565,772.56 - Step 6: Final answer
x = 108,993,742.31
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.