Home / 103,685.90-155,528.85-70,508.30

Finding the Fourth Proportional to 103,685.90, 155,528.85 and 70,508.30

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Solution

The fourth proportional to 103,685.90, 155,528.85 and 70,508.30 is: 105,762.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,685.90 : 155,528.85 = 70,508.30 : x
  2. Step 2: Convert to fraction form
    103,685.90/155,528.85 = 70,508.30/x
  3. Step 3: Cross multiply
    103,685.90x = 155,528.85 × 70,508.30
  4. Step 4: Simplify right side
    103,685.90x = 10,966,074,814.46
  5. Step 5: Solve for x
    x = 10,966,074,814.46/103,685.90
  6. Step 6: Final answer
    x = 105,762.45

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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.