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Finding the Fourth Proportional to 90,471.88, 124,769.44 and 56,483.52

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Solution

The fourth proportional to 90,471.88, 124,769.44 and 56,483.52 is: 77,896.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,471.88 : 124,769.44 = 56,483.52 : x
  2. Step 2: Convert to fraction form
    90,471.88/124,769.44 = 56,483.52/x
  3. Step 3: Cross multiply
    90,471.88x = 124,769.44 × 56,483.52
  4. Step 4: Simplify right side
    90,471.88x = 7,047,417,159.63
  5. Step 5: Solve for x
    x = 7,047,417,159.63/90,471.88
  6. Step 6: Final answer
    x = 77,896.22

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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.