Home / 80,931,637.30-121,397,455.95-72,428,581.30

Finding the Fourth Proportional to 80,931,637.30, 121,397,455.95 and 72,428,581.30

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Solution

The fourth proportional to 80,931,637.30, 121,397,455.95 and 72,428,581.30 is: 108,642,871.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,931,637.30 : 121,397,455.95 = 72,428,581.30 : x
  2. Step 2: Convert to fraction form
    80,931,637.30/121,397,455.95 = 72,428,581.30/x
  3. Step 3: Cross multiply
    80,931,637.30x = 121,397,455.95 × 72,428,581.30
  4. Step 4: Simplify right side
    80,931,637.30x = 8,792,645,507,887,744
  5. Step 5: Solve for x
    x = 8,792,645,507,887,744/80,931,637.30
  6. Step 6: Final answer
    x = 108,642,871.95

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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.