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Finding the Fourth Proportional to 101,130.77, 139,501.54 and 64,819.28

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Solution

The fourth proportional to 101,130.77, 139,501.54 and 64,819.28 is: 89,412.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,130.77 : 139,501.54 = 64,819.28 : x
  2. Step 2: Convert to fraction form
    101,130.77/139,501.54 = 64,819.28/x
  3. Step 3: Cross multiply
    101,130.77x = 139,501.54 × 64,819.28
  4. Step 4: Simplify right side
    101,130.77x = 9,042,389,568.40
  5. Step 5: Solve for x
    x = 9,042,389,568.40/101,130.77
  6. Step 6: Final answer
    x = 89,412.84

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1.5x scale

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.