Finding the Fourth Proportional to 128,051.24, 176,710.74 and 71,461.40
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Solution
The fourth proportional to 128,051.24, 176,710.74 and 71,461.40 is: 98,616.75
Step by Step Solution
- Step 1: Write the proportion equation
128,051.24 : 176,710.74 = 71,461.40 : x - Step 2: Convert to fraction form
128,051.24/176,710.74 = 71,461.40/x - Step 3: Cross multiply
128,051.24x = 176,710.74 × 71,461.40 - Step 4: Simplify right side
128,051.24x = 12,627,996,875.44 - Step 5: Solve for x
x = 12,627,996,875.44/128,051.24 - Step 6: Final answer
x = 98,616.75
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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.