Finding the Fourth Proportional to 219,045.15, 302,346.99 and 128,420.73
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Solution
The fourth proportional to 219,045.15, 302,346.99 and 128,420.73 is: 177,258.53
Step by Step Solution
- Step 1: Write the proportion equation
219,045.15 : 302,346.99 = 128,420.73 : x - Step 2: Convert to fraction form
219,045.15/302,346.99 = 128,420.73/x - Step 3: Cross multiply
219,045.15x = 302,346.99 × 128,420.73 - Step 4: Simplify right side
219,045.15x = 38,827,621,169.10 - Step 5: Solve for x
x = 38,827,621,169.10/219,045.15 - Step 6: Final answer
x = 177,258.53
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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.