Home / 56,129.13-77,458.10-30,978.63

Finding the Fourth Proportional to 56,129.13, 77,458.10 and 30,978.63

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Solution

The fourth proportional to 56,129.13, 77,458.10 and 30,978.63 is: 42,750.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,129.13 : 77,458.10 = 30,978.63 : x
  2. Step 2: Convert to fraction form
    56,129.13/77,458.10 = 30,978.63/x
  3. Step 3: Cross multiply
    56,129.13x = 77,458.10 × 30,978.63
  4. Step 4: Simplify right side
    56,129.13x = 2,399,545,665.51
  5. Step 5: Solve for x
    x = 2,399,545,665.51/56,129.13
  6. Step 6: Final answer
    x = 42,750.45

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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.