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Finding the Fourth Proportional to 90,477.92, 124,807.28 and 56,427.30

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Solution

The fourth proportional to 90,477.92, 124,807.28 and 56,427.30 is: 77,837.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,477.92 : 124,807.28 = 56,427.30 : x
  2. Step 2: Convert to fraction form
    90,477.92/124,807.28 = 56,427.30/x
  3. Step 3: Cross multiply
    90,477.92x = 124,807.28 × 56,427.30
  4. Step 4: Simplify right side
    90,477.92x = 7,042,537,830.74
  5. Step 5: Solve for x
    x = 7,042,537,830.74/90,477.92
  6. Step 6: Final answer
    x = 77,837.09

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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.