Finding the Fourth Proportional to 130,643.18, 180,278.51 and 76,916.79
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Solution
The fourth proportional to 130,643.18, 180,278.51 and 76,916.79 is: 106,139.83
Step by Step Solution
- Step 1: Write the proportion equation
130,643.18 : 180,278.51 = 76,916.79 : x - Step 2: Convert to fraction form
130,643.18/180,278.51 = 76,916.79/x - Step 3: Cross multiply
130,643.18x = 180,278.51 × 76,916.79 - Step 4: Simplify right side
130,643.18x = 13,866,444,343.26 - Step 5: Solve for x
x = 13,866,444,343.26/130,643.18 - Step 6: Final answer
x = 106,139.83
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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.