Home / 103,715.40-155,573.10-78,832.20

Finding the Fourth Proportional to 103,715.40, 155,573.10 and 78,832.20

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Solution

The fourth proportional to 103,715.40, 155,573.10 and 78,832.20 is: 118,248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,715.40 : 155,573.10 = 78,832.20 : x
  2. Step 2: Convert to fraction form
    103,715.40/155,573.10 = 78,832.20/x
  3. Step 3: Cross multiply
    103,715.40x = 155,573.10 × 78,832.20
  4. Step 4: Simplify right side
    103,715.40x = 12,264,169,733.82
  5. Step 5: Solve for x
    x = 12,264,169,733.82/103,715.40
  6. Step 6: Final answer
    x = 118,248.30

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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.