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Finding the Fourth Proportional to 125,920.40, 188,880.60 and 70,509.20

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Solution

The fourth proportional to 125,920.40, 188,880.60 and 70,509.20 is: 105,763.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,920.40 : 188,880.60 = 70,509.20 : x
  2. Step 2: Convert to fraction form
    125,920.40/188,880.60 = 70,509.20/x
  3. Step 3: Cross multiply
    125,920.40x = 188,880.60 × 70,509.20
  4. Step 4: Simplify right side
    125,920.40x = 13,317,820,001.52
  5. Step 5: Solve for x
    x = 13,317,820,001.52/125,920.40
  6. Step 6: Final answer
    x = 105,763.80

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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.