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Finding the Fourth Proportional to 61,153.70, 91,730.55 and 51,312.20

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Solution

The fourth proportional to 61,153.70, 91,730.55 and 51,312.20 is: 76,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,153.70 : 91,730.55 = 51,312.20 : x
  2. Step 2: Convert to fraction form
    61,153.70/91,730.55 = 51,312.20/x
  3. Step 3: Cross multiply
    61,153.70x = 91,730.55 × 51,312.20
  4. Step 4: Simplify right side
    61,153.70x = 4,706,896,327.71
  5. Step 5: Solve for x
    x = 4,706,896,327.71/61,153.70
  6. Step 6: Final answer
    x = 76,968.30

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1.5x scale

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.