Finding the Fourth Proportional to 128,723,047.72, 177,641,289.14 and 69,989,656.04
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Solution
The fourth proportional to 128,723,047.72, 177,641,289.14 and 69,989,656.04 is: 96,587,619.28
Step by Step Solution
- Step 1: Write the proportion equation
128,723,047.72 : 177,641,289.14 = 69,989,656.04 : x - Step 2: Convert to fraction form
128,723,047.72/177,641,289.14 = 69,989,656.04/x - Step 3: Cross multiply
128,723,047.72x = 177,641,289.14 × 69,989,656.04 - Step 4: Simplify right side
128,723,047.72x = 12,433,052,725,410,788 - Step 5: Solve for x
x = 12,433,052,725,410,788/128,723,047.72 - Step 6: Final answer
x = 96,587,619.28
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.