Home / 56,128.64-77,457.14-30,978.14

Finding the Fourth Proportional to 56,128.64, 77,457.14 and 30,978.14

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Solution

The fourth proportional to 56,128.64, 77,457.14 and 30,978.14 is: 42,749.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,128.64 : 77,457.14 = 30,978.14 : x
  2. Step 2: Convert to fraction form
    56,128.64/77,457.14 = 30,978.14/x
  3. Step 3: Cross multiply
    56,128.64x = 77,457.14 × 30,978.14
  4. Step 4: Simplify right side
    56,128.64x = 2,399,478,126.92
  5. Step 5: Solve for x
    x = 2,399,478,126.92/56,128.64
  6. Step 6: Final answer
    x = 42,749.62

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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.