Finding the Fourth Proportional to 138,154,616.50, 190,670,089.08 and 78,630,385.84
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Solution
The fourth proportional to 138,154,616.50, 190,670,089.08 and 78,630,385.84 is: 108,519,447.65
Step by Step Solution
- Step 1: Write the proportion equation
138,154,616.50 : 190,670,089.08 = 78,630,385.84 : x - Step 2: Convert to fraction form
138,154,616.50/190,670,089.08 = 78,630,385.84/x - Step 3: Cross multiply
138,154,616.50x = 190,670,089.08 × 78,630,385.84 - Step 4: Simplify right side
138,154,616.50x = 14,992,462,671,834,320 - Step 5: Solve for x
x = 14,992,462,671,834,320/138,154,616.50 - Step 6: Final answer
x = 108,519,447.65
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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.