Home / 290,328,045.90-435,492,068.85-128,769,981.90

Finding the Fourth Proportional to 290,328,045.90, 435,492,068.85 and 128,769,981.90

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Solution

The fourth proportional to 290,328,045.90, 435,492,068.85 and 128,769,981.90 is: 193,154,972.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,328,045.90 : 435,492,068.85 = 128,769,981.90 : x
  2. Step 2: Convert to fraction form
    290,328,045.90/435,492,068.85 = 128,769,981.90/x
  3. Step 3: Cross multiply
    290,328,045.90x = 435,492,068.85 × 128,769,981.90
  4. Step 4: Simplify right side
    290,328,045.90x = 56,078,305,823,408,056
  5. Step 5: Solve for x
    x = 56,078,305,823,408,056/290,328,045.90
  6. Step 6: Final answer
    x = 193,154,972.85

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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.