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Finding the Fourth Proportional to 103,675.90, 155,513.85 and 70,498.30

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Solution

The fourth proportional to 103,675.90, 155,513.85 and 70,498.30 is: 105,747.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,675.90 : 155,513.85 = 70,498.30 : x
  2. Step 2: Convert to fraction form
    103,675.90/155,513.85 = 70,498.30/x
  3. Step 3: Cross multiply
    103,675.90x = 155,513.85 × 70,498.30
  4. Step 4: Simplify right side
    103,675.90x = 10,963,462,051.46
  5. Step 5: Solve for x
    x = 10,963,462,051.46/103,675.90
  6. Step 6: Final answer
    x = 105,747.45

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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.