Finding the Fourth Proportional to 81,191,167.36, 121,890,679.68 and 69,749,833.12
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Solution
The fourth proportional to 81,191,167.36, 121,890,679.68 and 69,749,833.12 is: 104,714,032.86
Step by Step Solution
- Step 1: Write the proportion equation
81,191,167.36 : 121,890,679.68 = 69,749,833.12 : x - Step 2: Convert to fraction form
81,191,167.36/121,890,679.68 = 69,749,833.12/x - Step 3: Cross multiply
81,191,167.36x = 121,890,679.68 × 69,749,833.12 - Step 4: Simplify right side
81,191,167.36x = 8,501,854,566,563,376 - Step 5: Solve for x
x = 8,501,854,566,563,376/81,191,167.36 - Step 6: Final answer
x = 104,714,032.86
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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.