Finding the Fourth Proportional to 121,430.07, 167,497.74 and 78,393.03
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Solution
The fourth proportional to 121,430.07, 167,497.74 and 78,393.03 is: 108,133.47
Step by Step Solution
- Step 1: Write the proportion equation
121,430.07 : 167,497.74 = 78,393.03 : x - Step 2: Convert to fraction form
121,430.07/167,497.74 = 78,393.03/x - Step 3: Cross multiply
121,430.07x = 167,497.74 × 78,393.03 - Step 4: Simplify right side
121,430.07x = 13,130,655,356.75 - Step 5: Solve for x
x = 13,130,655,356.75/121,430.07 - Step 6: Final answer
x = 108,133.47
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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.