Finding the Fourth Proportional to 128,860,372.74, 177,827,340.69 and 70,913,620.74
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Solution
The fourth proportional to 128,860,372.74, 177,827,340.69 and 70,913,620.74 is: 97,860,811.10
Step by Step Solution
- Step 1: Write the proportion equation
128,860,372.74 : 177,827,340.69 = 70,913,620.74 : x - Step 2: Convert to fraction form
128,860,372.74/177,827,340.69 = 70,913,620.74/x - Step 3: Cross multiply
128,860,372.74x = 177,827,340.69 × 70,913,620.74 - Step 4: Simplify right side
128,860,372.74x = 12,610,380,594,893,428 - Step 5: Solve for x
x = 12,610,380,594,893,428/128,860,372.74 - Step 6: Final answer
x = 97,860,811.10
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1.5x scale
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.