Home / 138,130.02-190,636.29-77,703.21

Finding the Fourth Proportional to 138,130.02, 190,636.29 and 77,703.21

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Solution

The fourth proportional to 138,130.02, 190,636.29 and 77,703.21 is: 107,239.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,130.02 : 190,636.29 = 77,703.21 : x
  2. Step 2: Convert to fraction form
    138,130.02/190,636.29 = 77,703.21/x
  3. Step 3: Cross multiply
    138,130.02x = 190,636.29 × 77,703.21
  4. Step 4: Simplify right side
    138,130.02x = 14,813,051,675.49
  5. Step 5: Solve for x
    x = 14,813,051,675.49/138,130.02
  6. Step 6: Final answer
    x = 107,239.92

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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.