Home / 103,689.40-155,534.10-70,511.80

Finding the Fourth Proportional to 103,689.40, 155,534.10 and 70,511.80

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Solution

The fourth proportional to 103,689.40, 155,534.10 and 70,511.80 is: 105,767.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.40 : 155,534.10 = 70,511.80 : x
  2. Step 2: Convert to fraction form
    103,689.40/155,534.10 = 70,511.80/x
  3. Step 3: Cross multiply
    103,689.40x = 155,534.10 × 70,511.80
  4. Step 4: Simplify right side
    103,689.40x = 10,966,989,352.38
  5. Step 5: Solve for x
    x = 10,966,989,352.38/103,689.40
  6. Step 6: Final answer
    x = 105,767.70

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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.