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Finding the Fourth Proportional to 153,404.70, 211,642.30 and 92,931.72

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Solution

The fourth proportional to 153,404.70, 211,642.30 and 92,931.72 is: 128,211.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,404.70 : 211,642.30 = 92,931.72 : x
  2. Step 2: Convert to fraction form
    153,404.70/211,642.30 = 92,931.72/x
  3. Step 3: Cross multiply
    153,404.70x = 211,642.30 × 92,931.72
  4. Step 4: Simplify right side
    153,404.70x = 19,668,282,963.76
  5. Step 5: Solve for x
    x = 19,668,282,963.76/153,404.70
  6. Step 6: Final answer
    x = 128,211.74

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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.