Finding the Fourth Proportional to 130,724.36, 180,399.62 and 74,135.74
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Solution
The fourth proportional to 130,724.36, 180,399.62 and 74,135.74 is: 102,307.32
Step by Step Solution
- Step 1: Write the proportion equation
130,724.36 : 180,399.62 = 74,135.74 : x - Step 2: Convert to fraction form
130,724.36/180,399.62 = 74,135.74/x - Step 3: Cross multiply
130,724.36x = 180,399.62 × 74,135.74 - Step 4: Simplify right side
130,724.36x = 13,374,058,422.42 - Step 5: Solve for x
x = 13,374,058,422.42/130,724.36 - Step 6: Final answer
x = 102,307.32
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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.