Home / 90,274.72-124,463.64-61,931.20

Finding the Fourth Proportional to 90,274.72, 124,463.64 and 61,931.20

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Solution

The fourth proportional to 90,274.72, 124,463.64 and 61,931.20 is: 85,385.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,274.72 : 124,463.64 = 61,931.20 : x
  2. Step 2: Convert to fraction form
    90,274.72/124,463.64 = 61,931.20/x
  3. Step 3: Cross multiply
    90,274.72x = 124,463.64 × 61,931.20
  4. Step 4: Simplify right side
    90,274.72x = 7,708,182,581.57
  5. Step 5: Solve for x
    x = 7,708,182,581.57/90,274.72
  6. Step 6: Final answer
    x = 85,385.84

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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.