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Finding the Fourth Proportional to 314,928,343.70, 472,392,515.55 and 84,920,678.90

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Solution

The fourth proportional to 314,928,343.70, 472,392,515.55 and 84,920,678.90 is: 127,381,018.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,928,343.70 : 472,392,515.55 = 84,920,678.90 : x
  2. Step 2: Convert to fraction form
    314,928,343.70/472,392,515.55 = 84,920,678.90/x
  3. Step 3: Cross multiply
    314,928,343.70x = 472,392,515.55 × 84,920,678.90
  4. Step 4: Simplify right side
    314,928,343.70x = 40,115,893,127,784,808
  5. Step 5: Solve for x
    x = 40,115,893,127,784,808/314,928,343.70
  6. Step 6: Final answer
    x = 127,381,018.35

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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.