Home / 121,943,547.66-168,254,309.79-72,358,309.02

Finding the Fourth Proportional to 121,943,547.66, 168,254,309.79 and 72,358,309.02

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Solution

The fourth proportional to 121,943,547.66, 168,254,309.79 and 72,358,309.02 is: 99,837,978.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,943,547.66 : 168,254,309.79 = 72,358,309.02 : x
  2. Step 2: Convert to fraction form
    121,943,547.66/168,254,309.79 = 72,358,309.02/x
  3. Step 3: Cross multiply
    121,943,547.66x = 168,254,309.79 × 72,358,309.02
  4. Step 4: Simplify right side
    121,943,547.66x = 12,174,597,341,731,630
  5. Step 5: Solve for x
    x = 12,174,597,341,731,630/121,943,547.66
  6. Step 6: Final answer
    x = 99,837,978.93

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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.