Home / 85,878,117.30-128,817,175.95-68,872,005.30

Finding the Fourth Proportional to 85,878,117.30, 128,817,175.95 and 68,872,005.30

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Solution

The fourth proportional to 85,878,117.30, 128,817,175.95 and 68,872,005.30 is: 103,308,007.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,878,117.30 : 128,817,175.95 = 68,872,005.30 : x
  2. Step 2: Convert to fraction form
    85,878,117.30/128,817,175.95 = 68,872,005.30/x
  3. Step 3: Cross multiply
    85,878,117.30x = 128,817,175.95 × 68,872,005.30
  4. Step 4: Simplify right side
    85,878,117.30x = 8,871,897,224,759,432
  5. Step 5: Solve for x
    x = 8,871,897,224,759,432/85,878,117.30
  6. Step 6: Final answer
    x = 103,308,007.95

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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.