Finding the Fourth Proportional to 128,216.64, 176,927.02 and 74,501.08
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Solution
The fourth proportional to 128,216.64, 176,927.02 and 74,501.08 is: 102,804.55
Step by Step Solution
- Step 1: Write the proportion equation
128,216.64 : 176,927.02 = 74,501.08 : x - Step 2: Convert to fraction form
128,216.64/176,927.02 = 74,501.08/x - Step 3: Cross multiply
128,216.64x = 176,927.02 × 74,501.08 - Step 4: Simplify right side
128,216.64x = 13,181,254,071.18 - Step 5: Solve for x
x = 13,181,254,071.18/128,216.64 - Step 6: Final answer
x = 102,804.55
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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.