Home / 77,985.13-107,569.93-51,129.38

Finding the Fourth Proportional to 77,985.13, 107,569.93 and 51,129.38

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Solution

The fourth proportional to 77,985.13, 107,569.93 and 51,129.38 is: 70,526.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,985.13 : 107,569.93 = 51,129.38 : x
  2. Step 2: Convert to fraction form
    77,985.13/107,569.93 = 51,129.38/x
  3. Step 3: Cross multiply
    77,985.13x = 107,569.93 × 51,129.38
  4. Step 4: Simplify right side
    77,985.13x = 5,499,983,289.69
  5. Step 5: Solve for x
    x = 5,499,983,289.69/77,985.13
  6. Step 6: Final answer
    x = 70,526.05

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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.