Finding the Fourth Proportional to 130,663.68, 180,312.64 and 76,226.28
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Solution
The fourth proportional to 130,663.68, 180,312.64 and 76,226.28 is: 105,190.38
Step by Step Solution
- Step 1: Write the proportion equation
130,663.68 : 180,312.64 = 76,226.28 : x - Step 2: Convert to fraction form
130,663.68/180,312.64 = 76,226.28/x - Step 3: Cross multiply
130,663.68x = 180,312.64 × 76,226.28 - Step 4: Simplify right side
130,663.68x = 13,744,561,784.18 - Step 5: Solve for x
x = 13,744,561,784.18/130,663.68 - Step 6: Final answer
x = 105,190.38
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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.