Home / 85,824,219.20-128,736,328.80-21,127,510.40

Finding the Fourth Proportional to 85,824,219.20, 128,736,328.80 and 21,127,510.40

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Solution

The fourth proportional to 85,824,219.20, 128,736,328.80 and 21,127,510.40 is: 31,691,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,219.20 : 128,736,328.80 = 21,127,510.40 : x
  2. Step 2: Convert to fraction form
    85,824,219.20/128,736,328.80 = 21,127,510.40/x
  3. Step 3: Cross multiply
    85,824,219.20x = 128,736,328.80 × 21,127,510.40
  4. Step 4: Simplify right side
    85,824,219.20x = 2,719,878,125,579,819.50
  5. Step 5: Solve for x
    x = 2,719,878,125,579,819.50/85,824,219.20
  6. Step 6: Final answer
    x = 31,691,265.60

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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.