Finding the Fourth Proportional to 128,038.10, 176,683.12 and 74,314.44
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Solution
The fourth proportional to 128,038.10, 176,683.12 and 74,314.44 is: 102,548.44
Step by Step Solution
- Step 1: Write the proportion equation
128,038.10 : 176,683.12 = 74,314.44 : x - Step 2: Convert to fraction form
128,038.10/176,683.12 = 74,314.44/x - Step 3: Cross multiply
128,038.10x = 176,683.12 × 74,314.44 - Step 4: Simplify right side
128,038.10x = 13,130,107,120.25 - Step 5: Solve for x
x = 13,130,107,120.25/128,038.10 - Step 6: Final answer
x = 102,548.44
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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.