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Finding the Fourth Proportional to 163,607.20, 245,410.80 and 84,875.20

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Solution

The fourth proportional to 163,607.20, 245,410.80 and 84,875.20 is: 127,312.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,607.20 : 245,410.80 = 84,875.20 : x
  2. Step 2: Convert to fraction form
    163,607.20/245,410.80 = 84,875.20/x
  3. Step 3: Cross multiply
    163,607.20x = 245,410.80 × 84,875.20
  4. Step 4: Simplify right side
    163,607.20x = 20,829,290,732.16
  5. Step 5: Solve for x
    x = 20,829,290,732.16/163,607.20
  6. Step 6: Final answer
    x = 127,312.80

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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.