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Finding the Fourth Proportional to 147,148.60, 220,814.10 and 77,078.20

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Solution

The fourth proportional to 147,148.60, 220,814.10 and 77,078.20 is: 115,665.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,148.60 : 220,814.10 = 77,078.20 : x
  2. Step 2: Convert to fraction form
    147,148.60/220,814.10 = 77,078.20/x
  3. Step 3: Cross multiply
    147,148.60x = 220,814.10 × 77,078.20
  4. Step 4: Simplify right side
    147,148.60x = 17,019,953,362.62
  5. Step 5: Solve for x
    x = 17,019,953,362.62/147,148.60
  6. Step 6: Final answer
    x = 115,665.07

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1.5x scale

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.