Finding the Fourth Proportional to 85,403,726.80, 128,105,590.20 and 81,223,349.20
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Solution
The fourth proportional to 85,403,726.80, 128,105,590.20 and 81,223,349.20 is: 121,835,023.80
Step by Step Solution
- Step 1: Write the proportion equation
85,403,726.80 : 128,105,590.20 = 81,223,349.20 : x - Step 2: Convert to fraction form
85,403,726.80/128,105,590.20 = 81,223,349.20/x - Step 3: Cross multiply
85,403,726.80x = 128,105,590.20 × 81,223,349.20 - Step 4: Simplify right side
85,403,726.80x = 10,405,165,087,286,698 - Step 5: Solve for x
x = 10,405,165,087,286,698/85,403,726.80 - Step 6: Final answer
x = 121,835,023.80
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Similar ratio
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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.