Home / 128,269.50-177,015.69-71,681.01

Finding the Fourth Proportional to 128,269.50, 177,015.69 and 71,681.01

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Solution

The fourth proportional to 128,269.50, 177,015.69 and 71,681.01 is: 98,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,269.50 : 177,015.69 = 71,681.01 : x
  2. Step 2: Convert to fraction form
    128,269.50/177,015.69 = 71,681.01/x
  3. Step 3: Cross multiply
    128,269.50x = 177,015.69 × 71,681.01
  4. Step 4: Simplify right side
    128,269.50x = 12,688,663,445.05
  5. Step 5: Solve for x
    x = 12,688,663,445.05/128,269.50
  6. Step 6: Final answer
    x = 98,921.91

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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.