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Finding the Fourth Proportional to 211,064.88, 316,613.76 and 61,307.60

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Solution

The fourth proportional to 211,064.88, 316,613.76 and 61,307.60 is: 91,966.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,064.88 : 316,613.76 = 61,307.60 : x
  2. Step 2: Convert to fraction form
    211,064.88/316,613.76 = 61,307.60/x
  3. Step 3: Cross multiply
    211,064.88x = 316,613.76 × 61,307.60
  4. Step 4: Simplify right side
    211,064.88x = 19,410,829,752.58
  5. Step 5: Solve for x
    x = 19,410,829,752.58/211,064.88
  6. Step 6: Final answer
    x = 91,966.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.