Finding the Fourth Proportional to 138,708,442.18, 191,417,646.72 and 76,832,766.55
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Solution
The fourth proportional to 138,708,442.18, 191,417,646.72 and 76,832,766.55 is: 106,029,215.91
Step by Step Solution
- Step 1: Write the proportion equation
138,708,442.18 : 191,417,646.72 = 76,832,766.55 : x - Step 2: Convert to fraction form
138,708,442.18/191,417,646.72 = 76,832,766.55/x - Step 3: Cross multiply
138,708,442.18x = 191,417,646.72 × 76,832,766.55 - Step 4: Simplify right side
138,708,442.18x = 14,707,147,363,988,132 - Step 5: Solve for x
x = 14,707,147,363,988,132/138,708,442.18 - Step 6: Final answer
x = 106,029,215.91
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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.