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Finding the Fourth Proportional to 61,875.80, 92,813.70 and 42,192.80

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Solution

The fourth proportional to 61,875.80, 92,813.70 and 42,192.80 is: 63,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,875.80 : 92,813.70 = 42,192.80 : x
  2. Step 2: Convert to fraction form
    61,875.80/92,813.70 = 42,192.80/x
  3. Step 3: Cross multiply
    61,875.80x = 92,813.70 × 42,192.80
  4. Step 4: Simplify right side
    61,875.80x = 3,916,069,881.36
  5. Step 5: Solve for x
    x = 3,916,069,881.36/61,875.80
  6. Step 6: Final answer
    x = 63,289.20

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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.