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Finding the Fourth Proportional to 70,307.49, 105,461.64 and 28,754.49

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Solution

The fourth proportional to 70,307.49, 105,461.64 and 28,754.49 is: 43,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,307.49 : 105,461.64 = 28,754.49 : x
  2. Step 2: Convert to fraction form
    70,307.49/105,461.64 = 28,754.49/x
  3. Step 3: Cross multiply
    70,307.49x = 105,461.64 × 28,754.49
  4. Step 4: Simplify right side
    70,307.49x = 3,032,495,672.76
  5. Step 5: Solve for x
    x = 3,032,495,672.76/70,307.49
  6. Step 6: Final answer
    x = 43,131.90

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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.