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Finding the Fourth Proportional to 128,435.00, 177,275.93 and 74,730.40

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Solution

The fourth proportional to 128,435.00, 177,275.93 and 74,730.40 is: 103,148.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.00 : 177,275.93 = 74,730.40 : x
  2. Step 2: Convert to fraction form
    128,435.00/177,275.93 = 74,730.40/x
  3. Step 3: Cross multiply
    128,435.00x = 177,275.93 × 74,730.40
  4. Step 4: Simplify right side
    128,435.00x = 13,247,900,342.43
  5. Step 5: Solve for x
    x = 13,247,900,342.43/128,435.00
  6. Step 6: Final answer
    x = 103,148.68

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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.