Finding the Fourth Proportional to 128,252.16, 176,987.61 and 71,663.58
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Solution
The fourth proportional to 128,252.16, 176,987.61 and 71,663.58 is: 98,895.53
Step by Step Solution
- Step 1: Write the proportion equation
128,252.16 : 176,987.61 = 71,663.58 : x - Step 2: Convert to fraction form
128,252.16/176,987.61 = 71,663.58/x - Step 3: Cross multiply
128,252.16x = 176,987.61 × 71,663.58 - Step 4: Simplify right side
128,252.16x = 12,683,565,748.24 - Step 5: Solve for x
x = 12,683,565,748.24/128,252.16 - Step 6: Final answer
x = 98,895.53
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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.