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Finding the Fourth Proportional to 124,774.80, 172,208.64 and 79,472.20

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Solution

The fourth proportional to 124,774.80, 172,208.64 and 79,472.20 is: 109,684.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,774.80 : 172,208.64 = 79,472.20 : x
  2. Step 2: Convert to fraction form
    124,774.80/172,208.64 = 79,472.20/x
  3. Step 3: Cross multiply
    124,774.80x = 172,208.64 × 79,472.20
  4. Step 4: Simplify right side
    124,774.80x = 13,685,799,479.81
  5. Step 5: Solve for x
    x = 13,685,799,479.81/124,774.80
  6. Step 6: Final answer
    x = 109,684.00

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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.