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Finding the Fourth Proportional to 280,117.60, 420,127.80 and 102,533.20

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Solution

The fourth proportional to 280,117.60, 420,127.80 and 102,533.20 is: 153,782.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,117.60 : 420,127.80 = 102,533.20 : x
  2. Step 2: Convert to fraction form
    280,117.60/420,127.80 = 102,533.20/x
  3. Step 3: Cross multiply
    280,117.60x = 420,127.80 × 102,533.20
  4. Step 4: Simplify right side
    280,117.60x = 43,077,047,742.96
  5. Step 5: Solve for x
    x = 43,077,047,742.96/280,117.60
  6. Step 6: Final answer
    x = 153,782.01

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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.