Home / 128,302.10-177,049.74-70,938.10

Finding the Fourth Proportional to 128,302.10, 177,049.74 and 70,938.10

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Solution

The fourth proportional to 128,302.10, 177,049.74 and 70,938.10 is: 97,890.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,302.10 : 177,049.74 = 70,938.10 : x
  2. Step 2: Convert to fraction form
    128,302.10/177,049.74 = 70,938.10/x
  3. Step 3: Cross multiply
    128,302.10x = 177,049.74 × 70,938.10
  4. Step 4: Simplify right side
    128,302.10x = 12,559,572,161.09
  5. Step 5: Solve for x
    x = 12,559,572,161.09/128,302.10
  6. Step 6: Final answer
    x = 97,890.62

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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.