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Finding the Fourth Proportional to 128,862.60, 173,411.55 and 128,862.60

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Solution

The fourth proportional to 128,862.60, 173,411.55 and 128,862.60 is: 173,411.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,862.60 : 173,411.55 = 128,862.60 : x
  2. Step 2: Convert to fraction form
    128,862.60/173,411.55 = 128,862.60/x
  3. Step 3: Cross multiply
    128,862.60x = 173,411.55 × 128,862.60
  4. Step 4: Simplify right side
    128,862.60x = 22,346,263,203.03
  5. Step 5: Solve for x
    x = 22,346,263,203.03/128,862.60
  6. Step 6: Final answer
    x = 173,411.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.