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Finding the Fourth Proportional to 139,142.76, 208,695.68 and 39,312.02

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Solution

The fourth proportional to 139,142.76, 208,695.68 and 39,312.02 is: 58,962.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,142.76 : 208,695.68 = 39,312.02 : x
  2. Step 2: Convert to fraction form
    139,142.76/208,695.68 = 39,312.02/x
  3. Step 3: Cross multiply
    139,142.76x = 208,695.68 × 39,312.02
  4. Step 4: Simplify right side
    139,142.76x = 8,204,248,746.07
  5. Step 5: Solve for x
    x = 8,204,248,746.07/139,142.76
  6. Step 6: Final answer
    x = 58,962.81

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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.