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Finding the Fourth Proportional to 124,871.40, 172,303.20 and 71,158.68

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Solution

The fourth proportional to 124,871.40, 172,303.20 and 71,158.68 is: 98,187.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,871.40 : 172,303.20 = 71,158.68 : x
  2. Step 2: Convert to fraction form
    124,871.40/172,303.20 = 71,158.68/x
  3. Step 3: Cross multiply
    124,871.40x = 172,303.20 × 71,158.68
  4. Step 4: Simplify right side
    124,871.40x = 12,260,868,271.78
  5. Step 5: Solve for x
    x = 12,260,868,271.78/124,871.40
  6. Step 6: Final answer
    x = 98,187.96

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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.