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Finding the Fourth Proportional to 128,035.55, 176,689.05 and 70,674.86

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Solution

The fourth proportional to 128,035.55, 176,689.05 and 70,674.86 is: 97,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,035.55 : 176,689.05 = 70,674.86 : x
  2. Step 2: Convert to fraction form
    128,035.55/176,689.05 = 70,674.86/x
  3. Step 3: Cross multiply
    128,035.55x = 176,689.05 × 70,674.86
  4. Step 4: Simplify right side
    128,035.55x = 12,487,473,872.28
  5. Step 5: Solve for x
    x = 12,487,473,872.28/128,035.55
  6. Step 6: Final answer
    x = 97,531.30

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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.