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Finding the Fourth Proportional to 268,482.90, 402,263.55 and 127,938.90

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Solution

The fourth proportional to 268,482.90, 402,263.55 and 127,938.90 is: 191,688.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,482.90 : 402,263.55 = 127,938.90 : x
  2. Step 2: Convert to fraction form
    268,482.90/402,263.55 = 127,938.90/x
  3. Step 3: Cross multiply
    268,482.90x = 402,263.55 × 127,938.90
  4. Step 4: Simplify right side
    268,482.90x = 51,465,156,097.10
  5. Step 5: Solve for x
    x = 51,465,156,097.10/268,482.90
  6. Step 6: Final answer
    x = 191,688.77

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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.