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Finding the Fourth Proportional to 153,701, 212,282.34 and 103,312.52

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Solution

The fourth proportional to 153,701, 212,282.34 and 103,312.52 is: 142,688.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,701 : 212,282.34 = 103,312.52 : x
  2. Step 2: Convert to fraction form
    153,701/212,282.34 = 103,312.52/x
  3. Step 3: Cross multiply
    153,701x = 212,282.34 × 103,312.52
  4. Step 4: Simplify right side
    153,701x = 21,931,423,496.90
  5. Step 5: Solve for x
    x = 21,931,423,496.90/153,701
  6. Step 6: Final answer
    x = 142,688.88

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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.