Finding the Fourth Proportional to 128,970.60, 193,455.90 and 97,477.80
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Solution
The fourth proportional to 128,970.60, 193,455.90 and 97,477.80 is: 146,216.70
Step by Step Solution
- Step 1: Write the proportion equation
128,970.60 : 193,455.90 = 97,477.80 : x - Step 2: Convert to fraction form
128,970.60/193,455.90 = 97,477.80/x - Step 3: Cross multiply
128,970.60x = 193,455.90 × 97,477.80 - Step 4: Simplify right side
128,970.60x = 18,857,655,529.02 - Step 5: Solve for x
x = 18,857,655,529.02/128,970.60 - Step 6: Final answer
x = 146,216.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.