Finding the Fourth Proportional to 128,143.16, 176,807.63 and 74,395.81
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Solution
The fourth proportional to 128,143.16, 176,807.63 and 74,395.81 is: 102,648.84
Step by Step Solution
- Step 1: Write the proportion equation
128,143.16 : 176,807.63 = 74,395.81 : x - Step 2: Convert to fraction form
128,143.16/176,807.63 = 74,395.81/x - Step 3: Cross multiply
128,143.16x = 176,807.63 × 74,395.81 - Step 4: Simplify right side
128,143.16x = 13,153,745,592.01 - Step 5: Solve for x
x = 13,153,745,592.01/128,143.16 - Step 6: Final answer
x = 102,648.84
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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.