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Finding the Fourth Proportional to 134,707.76, 185,819.56 and 84,319.28

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Solution

The fourth proportional to 134,707.76, 185,819.56 and 84,319.28 is: 116,312.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,707.76 : 185,819.56 = 84,319.28 : x
  2. Step 2: Convert to fraction form
    134,707.76/185,819.56 = 84,319.28/x
  3. Step 3: Cross multiply
    134,707.76x = 185,819.56 × 84,319.28
  4. Step 4: Simplify right side
    134,707.76x = 15,668,171,509.12
  5. Step 5: Solve for x
    x = 15,668,171,509.12/134,707.76
  6. Step 6: Final answer
    x = 116,312.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.