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Finding the Fourth Proportional to 124,605, 172,032.66 and 79,970.76

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Solution

The fourth proportional to 124,605, 172,032.66 and 79,970.76 is: 110,409.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,605 : 172,032.66 = 79,970.76 : x
  2. Step 2: Convert to fraction form
    124,605/172,032.66 = 79,970.76/x
  3. Step 3: Cross multiply
    124,605x = 172,032.66 × 79,970.76
  4. Step 4: Simplify right side
    124,605x = 13,757,582,565.02
  5. Step 5: Solve for x
    x = 13,757,582,565.02/124,605
  6. Step 6: Final answer
    x = 110,409.55

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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.