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Finding the Fourth Proportional to 70,397.47, 105,583.45 and 28,275.85

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Solution

The fourth proportional to 70,397.47, 105,583.45 and 28,275.85 is: 42,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,397.47 : 105,583.45 = 28,275.85 : x
  2. Step 2: Convert to fraction form
    70,397.47/105,583.45 = 28,275.85/x
  3. Step 3: Cross multiply
    70,397.47x = 105,583.45 × 28,275.85
  4. Step 4: Simplify right side
    70,397.47x = 2,985,461,389.34
  5. Step 5: Solve for x
    x = 2,985,461,389.34/70,397.47
  6. Step 6: Final answer
    x = 42,408.65

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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.