Home / 105,519.47-145,611.10-57,763.58

Finding the Fourth Proportional to 105,519.47, 145,611.10 and 57,763.58

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Solution

The fourth proportional to 105,519.47, 145,611.10 and 57,763.58 is: 79,710.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,519.47 : 145,611.10 = 57,763.58 : x
  2. Step 2: Convert to fraction form
    105,519.47/145,611.10 = 57,763.58/x
  3. Step 3: Cross multiply
    105,519.47x = 145,611.10 × 57,763.58
  4. Step 4: Simplify right side
    105,519.47x = 8,411,018,423.74
  5. Step 5: Solve for x
    x = 8,411,018,423.74/105,519.47
  6. Step 6: Final answer
    x = 79,710.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.