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Finding the Fourth Proportional to 125,915.40, 188,873.10 and 70,504.20

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Solution

The fourth proportional to 125,915.40, 188,873.10 and 70,504.20 is: 105,756.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,915.40 : 188,873.10 = 70,504.20 : x
  2. Step 2: Convert to fraction form
    125,915.40/188,873.10 = 70,504.20/x
  3. Step 3: Cross multiply
    125,915.40x = 188,873.10 × 70,504.20
  4. Step 4: Simplify right side
    125,915.40x = 13,316,346,817.02
  5. Step 5: Solve for x
    x = 13,316,346,817.02/125,915.40
  6. Step 6: Final answer
    x = 105,756.30

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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.