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Finding the Fourth Proportional to 124,461.81, 171,707.12 and 72,039.30

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Solution

The fourth proportional to 124,461.81, 171,707.12 and 72,039.30 is: 99,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,461.81 : 171,707.12 = 72,039.30 : x
  2. Step 2: Convert to fraction form
    124,461.81/171,707.12 = 72,039.30/x
  3. Step 3: Cross multiply
    124,461.81x = 171,707.12 × 72,039.30
  4. Step 4: Simplify right side
    124,461.81x = 12,369,660,369.62
  5. Step 5: Solve for x
    x = 12,369,660,369.62/124,461.81
  6. Step 6: Final answer
    x = 99,385.19

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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.