Home / 128,030.20-176,664.02-71,430.60

Finding the Fourth Proportional to 128,030.20, 176,664.02 and 71,430.60

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Solution

The fourth proportional to 128,030.20, 176,664.02 and 71,430.60 is: 98,564.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,030.20 : 176,664.02 = 71,430.60 : x
  2. Step 2: Convert to fraction form
    128,030.20/176,664.02 = 71,430.60/x
  3. Step 3: Cross multiply
    128,030.20x = 176,664.02 × 71,430.60
  4. Step 4: Simplify right side
    128,030.20x = 12,619,216,947.01
  5. Step 5: Solve for x
    x = 12,619,216,947.01/128,030.20
  6. Step 6: Final answer
    x = 98,564.38

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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.