Finding the Fourth Proportional to 155,980.40, 215,252.95 and 84,360.42
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Solution
The fourth proportional to 155,980.40, 215,252.95 and 84,360.42 is: 116,417.38
Step by Step Solution
- Step 1: Write the proportion equation
155,980.40 : 215,252.95 = 84,360.42 : x - Step 2: Convert to fraction form
155,980.40/215,252.95 = 84,360.42/x - Step 3: Cross multiply
155,980.40x = 215,252.95 × 84,360.42 - Step 4: Simplify right side
155,980.40x = 18,158,829,268.24 - Step 5: Solve for x
x = 18,158,829,268.24/155,980.40 - Step 6: Final answer
x = 116,417.38
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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.