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Finding the Fourth Proportional to 125,913.70, 188,870.55 and 42,807.70

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Solution

The fourth proportional to 125,913.70, 188,870.55 and 42,807.70 is: 64,211.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,913.70 : 188,870.55 = 42,807.70 : x
  2. Step 2: Convert to fraction form
    125,913.70/188,870.55 = 42,807.70/x
  3. Step 3: Cross multiply
    125,913.70x = 188,870.55 × 42,807.70
  4. Step 4: Simplify right side
    125,913.70x = 8,085,113,843.24
  5. Step 5: Solve for x
    x = 8,085,113,843.24/125,913.70
  6. Step 6: Final answer
    x = 64,211.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.