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Finding the Fourth Proportional to 142,878.55, 214,274.07 and 98,788.63

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Solution

The fourth proportional to 142,878.55, 214,274.07 and 98,788.63 is: 148,152.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,878.55 : 214,274.07 = 98,788.63 : x
  2. Step 2: Convert to fraction form
    142,878.55/214,274.07 = 98,788.63/x
  3. Step 3: Cross multiply
    142,878.55x = 214,274.07 × 98,788.63
  4. Step 4: Simplify right side
    142,878.55x = 21,167,841,819.82
  5. Step 5: Solve for x
    x = 21,167,841,819.82/142,878.55
  6. Step 6: Final answer
    x = 148,152.69

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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.