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Finding the Fourth Proportional to 71,402.88, 98,963.40 and 70,075.20

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Solution

The fourth proportional to 71,402.88, 98,963.40 and 70,075.20 is: 97,123.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,402.88 : 98,963.40 = 70,075.20 : x
  2. Step 2: Convert to fraction form
    71,402.88/98,963.40 = 70,075.20/x
  3. Step 3: Cross multiply
    71,402.88x = 98,963.40 × 70,075.20
  4. Step 4: Simplify right side
    71,402.88x = 6,934,880,047.68
  5. Step 5: Solve for x
    x = 6,934,880,047.68/71,402.88
  6. Step 6: Final answer
    x = 97,123.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.