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Finding the Fourth Proportional to 209,959,253.80, 314,938,880.70 and 56,620,810.60

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Solution

The fourth proportional to 209,959,253.80, 314,938,880.70 and 56,620,810.60 is: 84,931,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,959,253.80 : 314,938,880.70 = 56,620,810.60 : x
  2. Step 2: Convert to fraction form
    209,959,253.80/314,938,880.70 = 56,620,810.60/x
  3. Step 3: Cross multiply
    209,959,253.80x = 314,938,880.70 × 56,620,810.60
  4. Step 4: Simplify right side
    209,959,253.80x = 17,832,094,714,690,696
  5. Step 5: Solve for x
    x = 17,832,094,714,690,696/209,959,253.80
  6. Step 6: Final answer
    x = 84,931,215.90

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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.