Finding the Fourth Proportional to 221,088.93, 331,703.47 and 78,931.09
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Solution
The fourth proportional to 221,088.93, 331,703.47 and 78,931.09 is: 118,421.66
Step by Step Solution
- Step 1: Write the proportion equation
221,088.93 : 331,703.47 = 78,931.09 : x - Step 2: Convert to fraction form
221,088.93/331,703.47 = 78,931.09/x - Step 3: Cross multiply
221,088.93x = 331,703.47 × 78,931.09 - Step 4: Simplify right side
221,088.93x = 26,181,716,957.18 - Step 5: Solve for x
x = 26,181,716,957.18/221,088.93 - Step 6: Final answer
x = 118,421.66
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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.