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Finding the Fourth Proportional to 210,931.70, 316,347.63 and 61,132.34

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Solution

The fourth proportional to 210,931.70, 316,347.63 and 61,132.34 is: 91,684.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,931.70 : 316,347.63 = 61,132.34 : x
  2. Step 2: Convert to fraction form
    210,931.70/316,347.63 = 61,132.34/x
  3. Step 3: Cross multiply
    210,931.70x = 316,347.63 × 61,132.34
  4. Step 4: Simplify right side
    210,931.70x = 19,339,070,875.35
  5. Step 5: Solve for x
    x = 19,339,070,875.35/210,931.70
  6. Step 6: Final answer
    x = 91,684.04

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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.