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Finding the Fourth Proportional to 61,411.60, 91,898.70 and 42,603.40

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Solution

The fourth proportional to 61,411.60, 91,898.70 and 42,603.40 is: 63,753.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,411.60 : 91,898.70 = 42,603.40 : x
  2. Step 2: Convert to fraction form
    61,411.60/91,898.70 = 42,603.40/x
  3. Step 3: Cross multiply
    61,411.60x = 91,898.70 × 42,603.40
  4. Step 4: Simplify right side
    61,411.60x = 3,915,197,075.58
  5. Step 5: Solve for x
    x = 3,915,197,075.58/61,411.60
  6. Step 6: Final answer
    x = 63,753.38

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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.