Finding the Fourth Proportional to 98,013.69, 135,238.06 and 57,712.75
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Solution
The fourth proportional to 98,013.69, 135,238.06 and 57,712.75 is: 79,631.33
Step by Step Solution
- Step 1: Write the proportion equation
98,013.69 : 135,238.06 = 57,712.75 : x - Step 2: Convert to fraction form
98,013.69/135,238.06 = 57,712.75/x - Step 3: Cross multiply
98,013.69x = 135,238.06 × 57,712.75 - Step 4: Simplify right side
98,013.69x = 7,804,960,347.27 - Step 5: Solve for x
x = 7,804,960,347.27/98,013.69 - Step 6: Final answer
x = 79,631.33
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1.5x scale
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.