Finding the Fourth Proportional to 128,630,029.32, 177,489,458.28 and 76,417,723.08
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Solution
The fourth proportional to 128,630,029.32, 177,489,458.28 and 76,417,723.08 is: 105,444,586.65
Step by Step Solution
- Step 1: Write the proportion equation
128,630,029.32 : 177,489,458.28 = 76,417,723.08 : x - Step 2: Convert to fraction form
128,630,029.32/177,489,458.28 = 76,417,723.08/x - Step 3: Cross multiply
128,630,029.32x = 177,489,458.28 × 76,417,723.08 - Step 4: Simplify right side
128,630,029.32x = 13,563,340,272,460,252 - Step 5: Solve for x
x = 13,563,340,272,460,252/128,630,029.32 - Step 6: Final answer
x = 105,444,586.65
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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.